642466020488 has 48 divisors (see below), whose sum is σ = 1224716812800. Its totient is φ = 315912130560.

The previous prime is 642466020479. The next prime is 642466020527. The reversal of 642466020488 is 884020664246.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41735273 + ... + 41750663.

It is an arithmetic number, because the mean of its divisors is an integer number (25514933600).

Almost surely, 2^642466020488 is an apocalyptic number.

It is an amenable number.

642466020488 is a deficient number, since it is larger than the sum of its proper divisors (582250792312).

642466020488 is a wasteful number, since it uses less digits than its factorization.

642466020488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15990 (or 15729 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 642466020488 in words is "six hundred forty-two billion, four hundred sixty-six million, twenty thousand, four hundred eighty-eight".