685557270500 has 48 divisors (see below), whose sum is σ = 1510507265904. Its totient is φ = 271796134400.

The previous prime is 685557270493. The next prime is 685557270581. The reversal of 685557270500 is 5072755586.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 252624853924 + 432932416576 = 502618^2 + 657976^2 .

It is a super-2 number, since 2×685557270500² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

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, 6010379 + ... + 6123378.

It is an arithmetic number, because the mean of its divisors is an integer number (31468901373).

Almost surely, 2^685557270500 is an apocalyptic number.

It is an amenable number.

685557270500 is an abundant number, since it is smaller than the sum of its proper divisors (824949995404).

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

685557270500 is a wasteful number, since it uses less digits than its factorization.

685557270500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12133889 (or 12133877 counting only the distinct ones).

The product of its (nonzero) digits is 2940000, while the sum is 50.

The spelling of 685557270500 in words is "six hundred eighty-five billion, five hundred fifty-seven million, two hundred seventy thousand, five hundred".