641557334200 has 48 divisors (see below), whose sum is σ = 1513883830680. Its totient is φ = 252792735360.

The previous prime is 641557334183. The next prime is 641557334203. The reversal of 641557334200 is 2433755146.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641557334203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23925307 + ... + 23952106.

Almost surely, 2^641557334200 is an apocalyptic number.

It is an amenable number.

641557334200 is an abundant number, since it is smaller than the sum of its proper divisors (872326496480).

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

641557334200 is a wasteful number, since it uses less digits than its factorization.

641557334200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47877496 (or 47877487 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 641557334200 in words is "six hundred forty-one billion, five hundred fifty-seven million, three hundred thirty-four thousand, two hundred".