400641331662 has 48 divisors (see below), whose sum is σ = 1019814305328. Its totient is φ = 112067504640.

The previous prime is 400641331639. The next prime is 400641331711. The reversal of 400641331662 is 266133146004.

400641331662 is a `hidden beast` number, since 4 + 0 + 0 + 641 + 3 + 3 + 1 + 6 + 6 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77822083 + ... + 77827230.

It is an arithmetic number, because the mean of its divisors is an integer number (21246131361).

Almost surely, 2^400641331662 is an apocalyptic number.

400641331662 is an abundant number, since it is smaller than the sum of its proper divisors (619172973666).

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

400641331662 is a wasteful number, since it uses less digits than its factorization.

400641331662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155649345 (or 155649342 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 400641331662 its reverse (266133146004), we get a palindrome (666774477666).

The spelling of 400641331662 in words is "four hundred billion, six hundred forty-one million, three hundred thirty-one thousand, six hundred sixty-two".