646550344 has 16 divisors (see below), whose sum is σ = 1322489520. Its totient is φ = 293886480.

The previous prime is 646550323. The next prime is 646550357. The reversal of 646550344 is 443055646.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3673494 + ... + 3673669.

It is an arithmetic number, because the mean of its divisors is an integer number (82655595).

Almost surely, 2^646550344 is an apocalyptic number.

It is an amenable number.

646550344 is an abundant number, since it is smaller than the sum of its proper divisors (675939176).

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

646550344 is a wasteful number, since it uses less digits than its factorization.

646550344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347180 (or 7347176 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 646550344 is about 25427.3542469522. The cubic root of 646550344 is about 864.7039623128.

The spelling of 646550344 in words is "six hundred forty-six million, five hundred fifty thousand, three hundred forty-four".