2155642252365 has 32 divisors (see below), whose sum is σ = 3942239535360. Its totient is φ = 985313032704.

The previous prime is 2155642252343. The next prime is 2155642252367. The reversal of 2155642252365 is 5632522465512.

It is not a de Polignac number, because 2155642252365 - 2⁹ = 2155642251853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155642252367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 440734 + ... + 2122623.

It is an arithmetic number, because the mean of its divisors is an integer number (123194985480).

Almost surely, 2^{2155642252365} is an apocalyptic number.

It is an amenable number.

2155642252365 is a deficient number, since it is larger than the sum of its proper divisors (1786597282995).

2155642252365 is a wasteful number, since it uses less digits than its factorization.

2155642252365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571381.

The product of its digits is 4320000, while the sum is 48.

The spelling of 2155642252365 in words is "two trillion, one hundred fifty-five billion, six hundred forty-two million, two hundred fifty-two thousand, three hundred sixty-five".