648602604040 has 64 divisors (see below), whose sum is σ = 1545588676800. Its totient is φ = 244278312192.

The previous prime is 648602604029. The next prime is 648602604043. The reversal of 648602604040 is 40406206846.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 648602603984 and 648602604002.

It is not an unprimeable number, because it can be changed into a prime (648602604043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2493987 + ... + 2741746.

It is an arithmetic number, because the mean of its divisors is an integer number (24149823075).

Almost surely, 2^648602604040 is an apocalyptic number.

It is an amenable number.

648602604040 is an abundant number, since it is smaller than the sum of its proper divisors (896986072760).

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

648602604040 is a wasteful number, since it uses less digits than its factorization.

648602604040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235926 (or 5235922 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 648602604040 in words is "six hundred forty-eight billion, six hundred two million, six hundred four thousand, forty".