857228651580 has 96 divisors (see below), whose sum is σ = 2781767439360. Its totient is φ = 193178280960.

The previous prime is 857228651579. The next prime is 857228651611. The reversal of 857228651580 is 85156822758.

It is a super-2 number, since 2×857228651580² (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 857228651580.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14343565 + ... + 14403204.

It is an arithmetic number, because the mean of its divisors is an integer number (28976744160).

Almost surely, 2^857228651580 is an apocalyptic number.

It is an amenable number.

857228651580 is an abundant number, since it is smaller than the sum of its proper divisors (1924538787780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857228651580 is a wasteful number, since it uses less digits than its factorization.

857228651580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28746859 (or 28746857 counting only the distinct ones).

The product of its (nonzero) digits is 10752000, while the sum is 57.

The spelling of 857228651580 in words is "eight hundred fifty-seven billion, two hundred twenty-eight million, six hundred fifty-one thousand, five hundred eighty".