620645817836 has 24 divisors (see below), whose sum is σ = 1184894827200. Its totient is φ = 282105654800.

The previous prime is 620645817811. The next prime is 620645817881. The reversal of 620645817836 is 638718546026.

620645817836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2390315 + ... + 2637213.

It is an arithmetic number, because the mean of its divisors is an integer number (49370617800).

Almost surely, 2^620645817836 is an apocalyptic number.

It is an amenable number.

620645817836 is a deficient number, since it is larger than the sum of its proper divisors (564249009364).

620645817836 is a wasteful number, since it uses less digits than its factorization.

620645817836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304045 (or 304043 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 620645817836 in words is "six hundred twenty billion, six hundred forty-five million, eight hundred seventeen thousand, eight hundred thirty-six".