641899251060 has 24 divisors (see below), whose sum is σ = 1797317903136. Its totient is φ = 171173133600.

The previous prime is 641899251053. The next prime is 641899251107. The reversal of 641899251060 is 60152998146.

It is a super-2 number, since 2×641899251060² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641899250994 and 641899251012.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5349160366 + ... + 5349160485.

It is an arithmetic number, because the mean of its divisors is an integer number (74888245964).

Almost surely, 2^641899251060 is an apocalyptic number.

641899251060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641899251060 is an abundant number, since it is smaller than the sum of its proper divisors (1155418652076).

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

641899251060 is a wasteful number, since it uses less digits than its factorization.

641899251060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698320863 (or 10698320861 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 641899251060 in words is "six hundred forty-one billion, eight hundred ninety-nine million, two hundred fifty-one thousand, sixty".