857156655 has 16 divisors (see below), whose sum is σ = 1382252544. Its totient is φ = 453549600.

The previous prime is 857156639. The next prime is 857156723. The reversal of 857156655 is 556651758.

It is not a de Polignac number, because 857156655 - 2⁴ = 857156639 is a prime.

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, 223071 + ... + 226880.

It is an arithmetic number, because the mean of its divisors is an integer number (86390784).

Almost surely, 2^857156655 is an apocalyptic number.

857156655 is a deficient number, since it is larger than the sum of its proper divisors (525095889).

857156655 is a wasteful number, since it uses less digits than its factorization.

857156655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450086.

The product of its digits is 1260000, while the sum is 48.

The square root of 857156655 is about 29277.2378307791. The cubic root of 857156655 is about 949.9193486472.

The spelling of 857156655 in words is "eight hundred fifty-seven million, one hundred fifty-six thousand, six hundred fifty-five".