402131626321264 has 80 divisors (see below), whose sum is σ = 896304433791168. Its totient is φ = 171206460112896.

The previous prime is 402131626321241. The next prime is 402131626321279. The reversal of 402131626321264 is 462123626131204.

It is a self number, because there is not a number n which added to its sum of digits gives 402131626321264.

It is a congruent number.

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, 76895472 + ... + 81958384.

Almost surely, 2^{402131626321264} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402131626321264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448152216895584).

402131626321264 is an abundant number, since it is smaller than the sum of its proper divisors (494172807469904).

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

402131626321264 is a wasteful number, since it uses less digits than its factorization.

402131626321264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067602 (or 5067596 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 402131626321264 in words is "four hundred two trillion, one hundred thirty-one billion, six hundred twenty-six million, three hundred twenty-one thousand, two hundred sixty-four".