642126954380 has 24 divisors (see below), whose sum is σ = 1348507362048. Its totient is φ = 256843018368.

The previous prime is 642126954349. The next prime is 642126954407. The reversal of 642126954380 is 83459621246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217877 + ... + 1154003.

It is an arithmetic number, because the mean of its divisors is an integer number (56187806752).

Almost surely, 2^642126954380 is an apocalyptic number.

It is an amenable number.

642126954380 is an abundant number, since it is smaller than the sum of its proper divisors (706380407668).

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

642126954380 is a wasteful number, since it uses less digits than its factorization.

642126954380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970433 (or 970431 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 642126954380 in words is "six hundred forty-two billion, one hundred twenty-six million, nine hundred fifty-four thousand, three hundred eighty".