501786977868 has 96 divisors (see below), whose sum is σ = 1432459365120. Its totient is φ = 150635531520.

The previous prime is 501786977849. The next prime is 501786977953. The reversal of 501786977868 is 868779687105.

It is a junction number, because it is equal to n+sod(n) for n = 501786977796 and 501786977805.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1846621 + ... + 2100852.

It is an arithmetic number, because the mean of its divisors is an integer number (14921451720).

Almost surely, 2^501786977868 is an apocalyptic number.

It is an amenable number.

501786977868 is an abundant number, since it is smaller than the sum of its proper divisors (930672387252).

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

501786977868 is a wasteful number, since it uses less digits than its factorization.

501786977868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947604 (or 3947596 counting only the distinct ones).

The product of its (nonzero) digits is 284497920, while the sum is 72.

The spelling of 501786977868 in words is "five hundred one billion, seven hundred eighty-six million, nine hundred seventy-seven thousand, eight hundred sixty-eight".