642037324040 has 64 divisors (see below), whose sum is σ = 1651328069760. Its totient is φ = 220077089280.

The previous prime is 642037324039. The next prime is 642037324043. The reversal of 642037324040 is 40423730246.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (642037324043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985319 + ... + 1501641.

It is an arithmetic number, because the mean of its divisors is an integer number (25802001090).

Almost surely, 2^642037324040 is an apocalyptic number.

It is an amenable number.

642037324040 is an abundant number, since it is smaller than the sum of its proper divisors (1009290745720).

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

642037324040 is a wasteful number, since it uses less digits than its factorization.

642037324040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520782 (or 520778 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 35.

The spelling of 642037324040 in words is "six hundred forty-two billion, thirty-seven million, three hundred twenty-four thousand, forty".