646409150 has 12 divisors (see below), whose sum is σ = 1202321112. Its totient is φ = 258563640.

The previous prime is 646409123. The next prime is 646409161. The reversal of 646409150 is 51904646.

It is a self number, because there is not a number n which added to its sum of digits gives 646409150.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6464042 + ... + 6464141.

It is an arithmetic number, because the mean of its divisors is an integer number (100193426).

Almost surely, 2^646409150 is an apocalyptic number.

646409150 is a deficient number, since it is larger than the sum of its proper divisors (555911962).

646409150 is a wasteful number, since it uses less digits than its factorization.

646409150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12928195 (or 12928190 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 646409150 is about 25424.5776759418. The cubic root of 646409150 is about 864.6410128968.

The spelling of 646409150 in words is "six hundred forty-six million, four hundred nine thousand, one hundred fifty".