641126956080 has 80 divisors (see below), whose sum is σ = 2140377694560. Its totient is φ = 157815865344.

The previous prime is 641126956061. The next prime is 641126956091. The reversal of 641126956080 is 80659621146.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×641126956080² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 15 ways as a sum of consecutive naturals, for example, 102741585 + ... + 102747824.

It is an arithmetic number, because the mean of its divisors is an integer number (26754721182).

Almost surely, 2^641126956080 is an apocalyptic number.

641126956080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641126956080 is an abundant number, since it is smaller than the sum of its proper divisors (1499250738480).

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

641126956080 is a wasteful number, since it uses less digits than its factorization.

641126956080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205489438 (or 205489432 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 641126956080 in words is "six hundred forty-one billion, one hundred twenty-six million, nine hundred fifty-six thousand, eighty".