631634664330 has 48 divisors (see below), whose sum is σ = 1713652312320. Its totient is φ = 161112609504.

The previous prime is 631634664289. The next prime is 631634664341. The reversal of 631634664330 is 33466436136.

631634664330 is a `hidden beast` number, since 6 + 3 + 1 + 634 + 6 + 6 + 4 + 3 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon 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, 152566690 + ... + 152570829.

It is an arithmetic number, because the mean of its divisors is an integer number (35701089840).

Almost surely, 2^631634664330 is an apocalyptic number.

631634664330 is an abundant number, since it is smaller than the sum of its proper divisors (1082017647990).

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

631634664330 is a wasteful number, since it uses less digits than its factorization.

631634664330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305137555 (or 305137552 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 45.

It can be divided in two parts, 6316346 and 64330, that added together give a square (6380676 = 2526²).

The spelling of 631634664330 in words is "six hundred thirty-one billion, six hundred thirty-four million, six hundred sixty-four thousand, three hundred thirty".