2156957655 has 16 divisors (see below), whose sum is σ = 3451797504. Its totient is φ = 1150155680.

The previous prime is 2156957629. The next prime is 2156957689. The reversal of 2156957655 is 5567596512.

It is not a de Polignac number, because 2156957655 - 2¹¹ = 2156955607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2156957598 and 2156957607.

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, 93262 + ... + 114068.

It is an arithmetic number, because the mean of its divisors is an integer number (215737344).

Almost surely, 2^2156957655 is an apocalyptic number.

2156957655 is a deficient number, since it is larger than the sum of its proper divisors (1294839849).

2156957655 is a wasteful number, since it uses less digits than its factorization.

2156957655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27726.

The product of its digits is 2835000, while the sum is 51.

The square root of 2156957655 is about 46443.0582003382. The cubic root of 2156957655 is about 1292.0536275973.

The spelling of 2156957655 in words is "two billion, one hundred fifty-six million, nine hundred fifty-seven thousand, six hundred fifty-five".