2153649870 has 40 divisors (see below), whose sum is σ = 5790927384. Its totient is φ = 574306416.

The previous prime is 2153649847. The next prime is 2153649877. The reversal of 2153649870 is 789463512.

2153649870 is a `hidden beast` number, since 2 + 1 + 536 + 49 + 8 + 70 = 666.

2153649870 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

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

2153649870 is strictly pandigital in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153649877) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1328604 + ... + 1330223.

It is a 1-persistent number, because it is pandigital, but 2⋅2153649870 = 4307299740 is not.

Almost surely, 2^2153649870 is an apocalyptic number.

2153649870 is an abundant number, since it is smaller than the sum of its proper divisors (3637277514).

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

2153649870 is a wasteful number, since it uses less digits than its factorization.

2153649870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658846 (or 2658837 counting only the distinct ones).

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

The square root of 2153649870 is about 46407.4333485488. The cubic root of 2153649870 is about 1291.3928168849.

The spelling of 2153649870 in words is "two billion, one hundred fifty-three million, six hundred forty-nine thousand, eight hundred seventy".