855958631 has 4 divisors (see below), whose sum is σ = 933773064. Its totient is φ = 778144200.

The previous prime is 855958627. The next prime is 855958633. The reversal of 855958631 is 136859558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 855958631 - 2² = 855958627 is a prime.

It is a super-2 number, since 2×855958631² = 1465330355966788322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 855958631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855958633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38907200 + ... + 38907221.

It is an arithmetic number, because the mean of its divisors is an integer number (233443266).

Almost surely, 2^855958631 is an apocalyptic number.

855958631 is a deficient number, since it is larger than the sum of its proper divisors (77814433).

855958631 is a wasteful number, since it uses less digits than its factorization.

855958631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77814432.

The product of its digits is 1296000, while the sum is 50.

The square root of 855958631 is about 29256.7706864582. The cubic root of 855958631 is about 949.4765836913.

The spelling of 855958631 in words is "eight hundred fifty-five million, nine hundred fifty-eight thousand, six hundred thirty-one".