641166061560 has 128 divisors (see below), whose sum is σ = 2049140954880. Its totient is φ = 159932786688.

The previous prime is 641166061531. The next prime is 641166061567. The reversal of 641166061560 is 65160661146.

It is a super-2 number, since 2×641166061560² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641166061567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 631582 + ... + 1296621.

It is an arithmetic number, because the mean of its divisors is an integer number (16008913710).

Almost surely, 2^641166061560 is an apocalyptic number.

641166061560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641166061560 is an abundant number, since it is smaller than the sum of its proper divisors (1407974893320).

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

641166061560 is a wasteful number, since it uses less digits than its factorization.

641166061560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928397 (or 1928393 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 641166061560 in words is "six hundred forty-one billion, one hundred sixty-six million, sixty-one thousand, five hundred sixty".