402612306631 has 4 divisors (see below), whose sum is σ = 420117189552. Its totient is φ = 385107423712.

The previous prime is 402612306617. The next prime is 402612306673. The reversal of 402612306631 is 136603216204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402612306631 - 2⁵ = 402612306599 is a prime.

It is a super-2 number, since 2×402612306631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402612396631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8752441426 + ... + 8752441471.

It is an arithmetic number, because the mean of its divisors is an integer number (105029297388).

Almost surely, 2^402612306631 is an apocalyptic number.

402612306631 is a deficient number, since it is larger than the sum of its proper divisors (17504882921).

402612306631 is a wasteful number, since it uses less digits than its factorization.

402612306631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17504882920.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 402612306631 in words is "four hundred two billion, six hundred twelve million, three hundred six thousand, six hundred thirty-one".