642453160556 has 12 divisors (see below), whose sum is σ = 1125003271392. Its totient is φ = 321023654448.

The previous prime is 642453160543. The next prime is 642453160589. The reversal of 642453160556 is 655061354246.

It is a self number, because there is not a number n which added to its sum of digits gives 642453160556.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50724335 + ... + 50736998.

It is an arithmetic number, because the mean of its divisors is an integer number (93750272616).

Almost surely, 2^642453160556 is an apocalyptic number.

It is an amenable number.

642453160556 is a deficient number, since it is larger than the sum of its proper divisors (482550110836).

642453160556 is a wasteful number, since it uses less digits than its factorization.

642453160556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101462920 (or 101462918 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 642453160556 in words is "six hundred forty-two billion, four hundred fifty-three million, one hundred sixty thousand, five hundred fifty-six".