642386542896 has 120 divisors (see below), whose sum is σ = 2059385762304. Its totient is φ = 183113043840.

The previous prime is 642386542891. The next prime is 642386542907. The reversal of 642386542896 is 698245683246.

It is a happy number.

642386542896 is a `hidden beast` number, since 6 + 4 + 2 + 3 + 8 + 6 + 542 + 89 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (642386542891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304866 + ... + 1173761.

Almost surely, 2^642386542896 is an apocalyptic number.

It is an amenable number.

642386542896 is an abundant number, since it is smaller than the sum of its proper divisors (1416999219408).

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

642386542896 is a wasteful number, since it uses less digits than its factorization.

642386542896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479079 (or 1479070 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 63.

The spelling of 642386542896 in words is "six hundred forty-two billion, three hundred eighty-six million, five hundred forty-two thousand, eight hundred ninety-six".