641156545380 has 48 divisors (see below), whose sum is σ = 1933333585344. Its totient is φ = 157823149440.

The previous prime is 641156545373. The next prime is 641156545411. The reversal of 641156545380 is 83545651146.

It is a super-2 number, since 2×641156545380² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410997006 + ... + 410998565.

It is an arithmetic number, because the mean of its divisors is an integer number (40277783028).

Almost surely, 2^641156545380 is an apocalyptic number.

641156545380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641156545380 is an abundant number, since it is smaller than the sum of its proper divisors (1292177039964).

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

641156545380 is a wasteful number, since it uses less digits than its factorization.

641156545380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821995596 (or 821995594 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 641156545380 in words is "six hundred forty-one billion, one hundred fifty-six million, five hundred forty-five thousand, three hundred eighty".