2153239445565 has 64 divisors (see below), whose sum is σ = 4152532608000. Its totient is φ = 1052318587392.

The previous prime is 2153239445551. The next prime is 2153239445579. The reversal of 2153239445565 is 5655449323512.

2153239445565 is a `hidden beast` number, since 2 + 1 + 5 + 3 + 2 + 39 + 4 + 45 + 565 = 666.

It is an interprime number because it is at equal distance from previous prime (2153239445551) and next prime (2153239445579).

It is not a de Polignac number, because 2153239445565 - 2²⁷ = 2153105227837 is a prime.

It is a congruent number.

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, 4237365 + ... + 4718234.

It is an arithmetic number, because the mean of its divisors is an integer number (64883322000).

Almost surely, 2^{2153239445565} is an apocalyptic number.

It is an amenable number.

2153239445565 is a deficient number, since it is larger than the sum of its proper divisors (1999293162435).

2153239445565 is a wasteful number, since it uses less digits than its factorization.

2153239445565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8955763 (or 8955757 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 54.

The spelling of 2153239445565 in words is "two trillion, one hundred fifty-three billion, two hundred thirty-nine million, four hundred forty-five thousand, five hundred sixty-five".