400636417660 has 24 divisors (see below), whose sum is σ = 841349829600. Its totient is φ = 160252023744.

The previous prime is 400636417637. The next prime is 400636417669. The reversal of 400636417660 is 66714636004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400636417669) 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, 1616322 + ... + 1847638.

It is an arithmetic number, because the mean of its divisors is an integer number (35056242900).

Almost surely, 2^400636417660 is an apocalyptic number.

It is an amenable number.

400636417660 is an abundant number, since it is smaller than the sum of its proper divisors (440713411940).

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

400636417660 is a wasteful number, since it uses less digits than its factorization.

400636417660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317925 (or 317923 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 400636417660 in words is "four hundred billion, six hundred thirty-six million, four hundred seventeen thousand, six hundred sixty".