641361156 has 12 divisors (see below), whose sum is σ = 1496509392. Its totient is φ = 213787048.

The previous prime is 641361143. The next prime is 641361163. The reversal of 641361156 is 651163146.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×641361156² = 822688264851312672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26723370 + ... + 26723393.

It is an arithmetic number, because the mean of its divisors is an integer number (124709116).

Almost surely, 2^641361156 is an apocalyptic number.

It is an amenable number.

641361156 is an abundant number, since it is smaller than the sum of its proper divisors (855148236).

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

641361156 is a wasteful number, since it uses less digits than its factorization.

641361156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53446770 (or 53446768 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 641361156 is about 25325.1092001594. The cubic root of 641361156 is about 862.3843854272.

The spelling of 641361156 in words is "six hundred forty-one million, three hundred sixty-one thousand, one hundred fifty-six".