400245547631 has 4 divisors (see below), whose sum is σ = 423789403392. Its totient is φ = 376701691872.

The previous prime is 400245547627. The next prime is 400245547673. The reversal of 400245547631 is 136745542004.

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 400245547631 - 2² = 400245547627 is a prime.

It is a super-2 number, since 2×400245547631² (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 (400245547601) 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, 11771927855 + ... + 11771927888.

It is an arithmetic number, because the mean of its divisors is an integer number (105947350848).

Almost surely, 2^400245547631 is an apocalyptic number.

400245547631 is a deficient number, since it is larger than the sum of its proper divisors (23543855761).

400245547631 is a wasteful number, since it uses less digits than its factorization.

400245547631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23543855760.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 400245547631 in words is "four hundred billion, two hundred forty-five million, five hundred forty-seven thousand, six hundred thirty-one".