2145369870 has 96 divisors (see below), whose sum is σ = 6384388608. Its totient is φ = 489633984.

The previous prime is 2145369829. The next prime is 2145369907. The reversal of 2145369870 is 789635412.

2145369870 is a `hidden beast` number, since 21 + 4 + 536 + 98 + 7 + 0 = 666.

2145369870 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2145369870² = 9205223758207633800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

2145369870 is strictly pandigital in base 10.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 493647 + ... + 497973.

It is an arithmetic number, because the mean of its divisors is an integer number (66504048).

It is a 1-persistent number, because it is pandigital, but 2⋅2145369870 = 4290739740 is not.

Almost surely, 2^2145369870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145369870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3192194304).

2145369870 is an abundant number, since it is smaller than the sum of its proper divisors (4239018738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145369870 is a wasteful number, since it uses less digits than its factorization.

2145369870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134 (or 5131 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 2145369870 is about 46318.1375920924. The cubic root of 2145369870 is about 1289.7357129395.

The spelling of 2145369870 in words is "two billion, one hundred forty-five million, three hundred sixty-nine thousand, eight hundred seventy".