642486427312 has 20 divisors (see below), whose sum is σ = 1256903062480. Its totient is φ = 318124346688.

The previous prime is 642486427291. The next prime is 642486427321. The reversal of 642486427312 is 213724684246.

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, 194927487 + ... + 194930782.

It is an arithmetic number, because the mean of its divisors is an integer number (62845153124).

Almost surely, 2^642486427312 is an apocalyptic number.

It is an amenable number.

642486427312 is a deficient number, since it is larger than the sum of its proper divisors (614416635168).

642486427312 is a wasteful number, since it uses less digits than its factorization.

642486427312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389858380 (or 389858374 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 49.

The spelling of 642486427312 in words is "six hundred forty-two billion, four hundred eighty-six million, four hundred twenty-seven thousand, three hundred twelve".