2145162697722 has 128 divisors (see below), whose sum is σ = 5398111641600. Its totient is φ = 625788158400.

The previous prime is 2145162697709. The next prime is 2145162697771. The reversal of 2145162697722 is 2277962615412.

It is a happy number.

2145162697722 is a `hidden beast` number, since 2 + 1 + 4 + 5 + 1 + 626 + 9 + 7 + 7 + 2 + 2 = 666.

It is a super-3 number, since 3×2145162697722³ (a number of 38 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1073179 + ... + 2332817.

It is an arithmetic number, because the mean of its divisors is an integer number (42172747200).

Almost surely, 2^{2145162697722} is an apocalyptic number.

2145162697722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145162697722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2699055820800).

2145162697722 is an abundant number, since it is smaller than the sum of its proper divisors (3252948943878).

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

2145162697722 is a wasteful number, since it uses less digits than its factorization.

2145162697722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259769 (or 1259763 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 2145162697722 in words is "two trillion, one hundred forty-five billion, one hundred sixty-two million, six hundred ninety-seven thousand, seven hundred twenty-two".