642651560452 has 48 divisors (see below), whose sum is σ = 1228566024000. Its totient is φ = 291713304960.

The previous prime is 642651560431. The next prime is 642651560471. The reversal of 642651560452 is 254065156246.

It is a super-2 number, since 2×642651560452² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134190874 + ... + 134195662.

It is an arithmetic number, because the mean of its divisors is an integer number (25595125500).

Almost surely, 2^642651560452 is an apocalyptic number.

It is an amenable number.

642651560452 is a deficient number, since it is larger than the sum of its proper divisors (585914463548).

642651560452 is a wasteful number, since it uses less digits than its factorization.

642651560452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8356 (or 8354 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 642651560452 in words is "six hundred forty-two billion, six hundred fifty-one million, five hundred sixty thousand, four hundred fifty-two".