681252252186 has 64 divisors (see below), whose sum is σ = 1564856110080. Its totient is φ = 195542605440.

The previous prime is 681252252173. The next prime is 681252252199.

681252252186 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (681252252173) and next prime (681252252199).

It is a super-2 number, since 2×681252252186² (a number of 24 digits) contains 22 as substring.

It is a Curzon 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, 8176011 + ... + 8258913.

It is an arithmetic number, because the mean of its divisors is an integer number (24450876720).

Almost surely, 2^681252252186 is an apocalyptic number.

681252252186 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

681252252186 is an abundant number, since it is smaller than the sum of its proper divisors (883603857894).

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

681252252186 is a wasteful number, since it uses less digits than its factorization.

681252252186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89491.

The product of its digits is 921600, while the sum is 48.

The spelling of 681252252186 in words is "six hundred eighty-one billion, two hundred fifty-two million, two hundred fifty-two thousand, one hundred eighty-six".