642453160540 has 48 divisors (see below), whose sum is σ = 1398093681600. Its totient is φ = 247689695232.

The previous prime is 642453160529. The next prime is 642453160543. The reversal of 642453160540 is 45061354246.

It is a junction number, because it is equal to n+sod(n) for n = 642453160493 and 642453160502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642453160543) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 625200 + ... + 1294519.

It is an arithmetic number, because the mean of its divisors is an integer number (29126951700).

Almost surely, 2^642453160540 is an apocalyptic number.

It is an amenable number.

642453160540 is an abundant number, since it is smaller than the sum of its proper divisors (755640521060).

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

642453160540 is a wasteful number, since it uses less digits than its factorization.

642453160540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920334 (or 1920332 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 642453160540 in words is "six hundred forty-two billion, four hundred fifty-three million, one hundred sixty thousand, five hundred forty".