646155076 has 24 divisors (see below), whose sum is σ = 1293384960. Its totient is φ = 276693312.

The previous prime is 646155071. The next prime is 646155089. The reversal of 646155076 is 670551646.

It is not an unprimeable number, because it can be changed into a prime (646155071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27141 + ... + 45043.

It is an arithmetic number, because the mean of its divisors is an integer number (53891040).

Almost surely, 2^646155076 is an apocalyptic number.

It is an amenable number.

646155076 is an abundant number, since it is smaller than the sum of its proper divisors (647229884).

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

646155076 is a wasteful number, since it uses less digits than its factorization.

646155076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19203 (or 19201 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 646155076 is about 25419.5805630227. The cubic root of 646155076 is about 864.5277143823.

The spelling of 646155076 in words is "six hundred forty-six million, one hundred fifty-five thousand, seventy-six".