12402678857631 has 8 divisors (see below), whose sum is σ = 16539732471600. Its totient is φ = 8267038907712.

The previous prime is 12402678857629. The next prime is 12402678857633. The reversal of 12402678857631 is 13675887620421.

It is an interprime number because it is at equal distance from previous prime (12402678857629) and next prime (12402678857633).

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

It is not a de Polignac number, because 12402678857631 - 2¹ = 12402678857629 is a prime.

It is a super-2 number, since 2×12402678857631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402678857633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353395540 + ... + 353430633.

It is an arithmetic number, because the mean of its divisors is an integer number (2067466558950).

Almost surely, 2^{12402678857631} is an apocalyptic number.

12402678857631 is a deficient number, since it is larger than the sum of its proper divisors (4137053613969).

12402678857631 is an equidigital number, since it uses as much as digits as its factorization.

12402678857631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706832025.

The product of its (nonzero) digits is 27095040, while the sum is 60.

The spelling of 12402678857631 in words is "twelve trillion, four hundred two billion, six hundred seventy-eight million, eight hundred fifty-seven thousand, six hundred thirty-one".