856557831830 has 8 divisors (see below), whose sum is σ = 1541804097312. Its totient is φ = 342623132728.

The previous prime is 856557831823. The next prime is 856557831841. The reversal of 856557831830 is 38138755658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×856557831830² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 856557831830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42827891582 + ... + 42827891601.

It is an arithmetic number, because the mean of its divisors is an integer number (192725512164).

Almost surely, 2^856557831830 is an apocalyptic number.

856557831830 is a deficient number, since it is larger than the sum of its proper divisors (685246265482).

856557831830 is a wasteful number, since it uses less digits than its factorization.

856557831830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85655783190.

The product of its (nonzero) digits is 24192000, while the sum is 59.

The spelling of 856557831830 in words is "eight hundred fifty-six billion, five hundred fifty-seven million, eight hundred thirty-one thousand, eight hundred thirty".