642486747260 has 12 divisors (see below), whose sum is σ = 1349222169288. Its totient is φ = 256994698896.

The previous prime is 642486747193. The next prime is 642486747277. The reversal of 642486747260 is 62747684246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642486747196 and 642486747205.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16062168662 + ... + 16062168701.

It is an arithmetic number, because the mean of its divisors is an integer number (112435180774).

Almost surely, 2^642486747260 is an apocalyptic number.

It is an amenable number.

642486747260 is an abundant number, since it is smaller than the sum of its proper divisors (706735422028).

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

642486747260 is a wasteful number, since it uses less digits than its factorization.

642486747260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32124337372 (or 32124337370 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 56.

The spelling of 642486747260 in words is "six hundred forty-two billion, four hundred eighty-six million, seven hundred forty-seven thousand, two hundred sixty".