641940708 has 12 divisors (see below), whose sum is σ = 1497861680. Its totient is φ = 213980232.

The previous prime is 641940697. The next prime is 641940727. The reversal of 641940708 is 807049146.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 26747518 + ... + 26747541.

Almost surely, 2^641940708 is an apocalyptic number.

It is an amenable number.

641940708 is an abundant number, since it is smaller than the sum of its proper divisors (855920972).

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

641940708 is a wasteful number, since it uses less digits than its factorization.

641940708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53495066 (or 53495064 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 641940708 is about 25336.5488573326. The cubic root of 641940708 is about 862.6440654961.

The spelling of 641940708 in words is "six hundred forty-one million, nine hundred forty thousand, seven hundred eight".