2156135602165 has 16 divisors (see below), whose sum is σ = 2588771437056. Its totient is φ = 1723969584000.

The previous prime is 2156135602151. The next prime is 2156135602171. The reversal of 2156135602165 is 5612065316512.

It is a happy number.

It is not a de Polignac number, because 2156135602165 - 2¹¹ = 2156135600117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107845320 + ... + 107865310.

It is an arithmetic number, because the mean of its divisors is an integer number (161798214816).

Almost surely, 2^{2156135602165} is an apocalyptic number.

It is an amenable number.

2156135602165 is a deficient number, since it is larger than the sum of its proper divisors (432635834891).

2156135602165 is a wasteful number, since it uses less digits than its factorization.

2156135602165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30660.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 2156135602165 in words is "two trillion, one hundred fifty-six billion, one hundred thirty-five million, six hundred two thousand, one hundred sixty-five".