400460420664 has 64 divisors (see below), whose sum is σ = 1122234285600. Its totient is φ = 132305499648.

The previous prime is 400460420639. The next prime is 400460420699. The reversal of 400460420664 is 466024064004.

It is a happy number.

400460420664 is a `hidden beast` number, since 40 + 0 + 4 + 604 + 2 + 0 + 6 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 8179059 + ... + 8227874.

Almost surely, 2^400460420664 is an apocalyptic number.

It is an amenable number.

400460420664 is an abundant number, since it is smaller than the sum of its proper divisors (721773864936).

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

400460420664 is a wasteful number, since it uses less digits than its factorization.

400460420664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16407061 (or 16407051 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 400460420664 its reverse (466024064004), we get a palindrome (866484484668).

The spelling of 400460420664 in words is "four hundred billion, four hundred sixty million, four hundred twenty thousand, six hundred sixty-four".