642452311456 has 24 divisors (see below), whose sum is σ = 1269495267264. Its totient is φ = 320040815040.

The previous prime is 642452311331. The next prime is 642452311481. The reversal of 642452311456 is 654113254246.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37033090 + ... + 37050433.

It is an arithmetic number, because the mean of its divisors is an integer number (52895636136).

Almost surely, 2^642452311456 is an apocalyptic number.

It is an amenable number.

642452311456 is a deficient number, since it is larger than the sum of its proper divisors (627042955808).

642452311456 is a wasteful number, since it uses less digits than its factorization.

642452311456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74083804 (or 74083796 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 642452311456 in words is "six hundred forty-two billion, four hundred fifty-two million, three hundred eleven thousand, four hundred fifty-six".