641097700 has 18 divisors (see below), whose sum is σ = 1391182226. Its totient is φ = 256439040.

The previous prime is 641097697. The next prime is 641097757. The reversal of 641097700 is 7790146.

It can be written as a sum of positive squares in 3 ways, for example, as 183223296 + 457874404 = 13536^2 + 21398^2 .

It is a super-2 number, since 2×641097700² = 822012521890580000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3205389 + ... + 3205588.

Almost surely, 2^641097700 is an apocalyptic number.

It is an amenable number.

641097700 is an abundant number, since it is smaller than the sum of its proper divisors (750084526).

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

641097700 is a wasteful number, since it uses less digits than its factorization.

641097700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410991 (or 6410984 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 641097700 is about 25319.9071878236. The cubic root of 641097700 is about 862.2662868826.

The spelling of 641097700 in words is "six hundred forty-one million, ninety-seven thousand, seven hundred".