642147520937 has 24 divisors (see below), whose sum is σ = 712735077600. Its totient is φ = 577943233920.

The previous prime is 642147520921. The next prime is 642147520943. The reversal of 642147520937 is 739025741246.

It is not a de Polignac number, because 642147520937 - 2⁴ = 642147520921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642147528937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11745098 + ... + 11799644.

It is an arithmetic number, because the mean of its divisors is an integer number (29697294900).

Almost surely, 2^642147520937 is an apocalyptic number.

It is an amenable number.

642147520937 is a deficient number, since it is larger than the sum of its proper divisors (70587556663).

642147520937 is a wasteful number, since it uses less digits than its factorization.

642147520937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56313 (or 56300 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 642147520937 in words is "six hundred forty-two billion, one hundred forty-seven million, five hundred twenty thousand, nine hundred thirty-seven".