681075570186 has 32 divisors (see below), whose sum is σ = 1651092292800. Its totient is φ = 206386536240.

The previous prime is 681075570137. The next prime is 681075570223.

681075570186 is a `hidden beast` number, since 6 + 8 + 1 + 0 + 7 + 557 + 0 + 1 + 86 = 666.

681075570186 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 573295341 + ... + 573296528.

It is an arithmetic number, because the mean of its divisors is an integer number (51596634150).

Almost surely, 2^681075570186 is an apocalyptic number.

681075570186 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

681075570186 is an abundant number, since it is smaller than the sum of its proper divisors (970016722614).

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

681075570186 is a wasteful number, since it uses less digits than its factorization.

681075570186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146591891 (or 1146591885 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 681075570186 in words is "six hundred eighty-one billion, seventy-five million, five hundred seventy thousand, one hundred eighty-six".