681235614457 has 8 divisors (see below), whose sum is σ = 711406062720. Its totient is φ = 651111125280.

The previous prime is 681235614443. The next prime is 681235614469. The reversal of 681235614457 is 754416532186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 681235614457 - 2¹⁹ = 681235090169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681235614497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11459469 + ... + 11518762.

It is an arithmetic number, because the mean of its divisors is an integer number (88925757840).

Almost surely, 2^681235614457 is an apocalyptic number.

It is an amenable number.

681235614457 is a deficient number, since it is larger than the sum of its proper divisors (30170448263).

681235614457 is a wasteful number, since it uses less digits than its factorization.

681235614457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22979543.

The product of its digits is 4838400, while the sum is 52.

The spelling of 681235614457 in words is "six hundred eighty-one billion, two hundred thirty-five million, six hundred fourteen thousand, four hundred fifty-seven".