645515424036 has 72 divisors (see below), whose sum is σ = 1946792564640. Its totient is φ = 184432976784.

The previous prime is 645515424013. The next prime is 645515424053. The reversal of 645515424036 is 630424515546.

645515424036 is a `hidden beast` number, since 6 + 4 + 551 + 54 + 2 + 40 + 3 + 6 = 666.

645515424036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 645515423982 and 645515424000.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60984450 + ... + 60995033.

It is an arithmetic number, because the mean of its divisors is an integer number (27038785620).

Almost surely, 2^645515424036 is an apocalyptic number.

It is an amenable number.

645515424036 is an abundant number, since it is smaller than the sum of its proper divisors (1301277140604).

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

645515424036 is a wasteful number, since it uses less digits than its factorization.

645515424036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121979510 (or 121979495 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 645515424036 in words is "six hundred forty-five billion, five hundred fifteen million, four hundred twenty-four thousand, thirty-six".