642240404015460 has 48 divisors (see below), whose sum is σ = 1803455474619456. Its totient is φ = 170770551225472.

The previous prime is 642240404015453. The next prime is 642240404015513. The reversal of 642240404015460 is 64510404042246.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15423620007 + ... + 15423661646.

It is an arithmetic number, because the mean of its divisors is an integer number (37571989054572).

Almost surely, 2^{642240404015460} is an apocalyptic number.

642240404015460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

642240404015460 is an abundant number, since it is smaller than the sum of its proper divisors (1161215070603996).

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

642240404015460 is a wasteful number, since it uses less digits than its factorization.

642240404015460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30847282012 (or 30847282010 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 42.

The spelling of 642240404015460 in words is "six hundred forty-two trillion, two hundred forty billion, four hundred four million, fifteen thousand, four hundred sixty".