646006902 has 48 divisors (see below), whose sum is σ = 1409719440. Its totient is φ = 197171712.

The previous prime is 646006891. The next prime is 646006903. The reversal of 646006902 is 209600646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646006903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59124 + ... + 69192.

It is an arithmetic number, because the mean of its divisors is an integer number (29369155).

Almost surely, 2^646006902 is an apocalyptic number.

646006902 is an abundant number, since it is smaller than the sum of its proper divisors (763712538).

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

646006902 is a wasteful number, since it uses less digits than its factorization.

646006902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10145 (or 10128 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 646006902 is about 25416.6658316940. The cubic root of 646006902 is about 864.4616258495.

The spelling of 646006902 in words is "six hundred forty-six million, six thousand, nine hundred two".