646459950 has 24 divisors (see below), whose sum is σ = 1603221048. Its totient is φ = 172389280.

The previous prime is 646459943. The next prime is 646459951. The reversal of 646459950 is 59954646.

It is a self number, because there is not a number n which added to its sum of digits gives 646459950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646459951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2154717 + ... + 2155016.

It is an arithmetic number, because the mean of its divisors is an integer number (66800877).

Almost surely, 2^646459950 is an apocalyptic number.

646459950 is an abundant number, since it is smaller than the sum of its proper divisors (956761098).

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

646459950 is a wasteful number, since it uses less digits than its factorization.

646459950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309748 (or 4309743 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The square root of 646459950 is about 25425.5766896250. The cubic root of 646459950 is about 864.6636624384.

The spelling of 646459950 in words is "six hundred forty-six million, four hundred fifty-nine thousand, nine hundred fifty".