681671451875 has 10 divisors (see below), whose sum is σ = 851816647044. Its totient is φ = 545337161000.

The previous prime is 681671451859. The next prime is 681671451887. The reversal of 681671451875 is 578154176186.

It is a happy number.

It is not a de Polignac number, because 681671451875 - 2⁴ = 681671451859 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 545336537 + ... + 545337786.

Almost surely, 2^681671451875 is an apocalyptic number.

681671451875 is a deficient number, since it is larger than the sum of its proper divisors (170145195169).

681671451875 is an equidigital number, since it uses as much as digits as its factorization.

681671451875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090674343 (or 1090674328 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 59.

The spelling of 681671451875 in words is "six hundred eighty-one billion, six hundred seventy-one million, four hundred fifty-one thousand, eight hundred seventy-five".