648445810 has 16 divisors (see below), whose sum is σ = 1170256896. Its totient is φ = 258699568.

The previous prime is 648445781. The next prime is 648445823. The reversal of 648445810 is 18544846.

It is a super-2 number, since 2×648445810² = 840963937013112200, which contains 22 as substring.

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, 80824 + ... + 88483.

It is an arithmetic number, because the mean of its divisors is an integer number (73141056).

Almost surely, 2^648445810 is an apocalyptic number.

648445810 is a deficient number, since it is larger than the sum of its proper divisors (521811086).

648445810 is a wasteful number, since it uses less digits than its factorization.

648445810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169697.

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 648445810 is about 25464.5991525490. The cubic root of 648445810 is about 865.5481440016.

The spelling of 648445810 in words is "six hundred forty-eight million, four hundred forty-five thousand, eight hundred ten".