641153260 has 48 divisors (see below), whose sum is σ = 1482354720. Its totient is φ = 230999040.

The previous prime is 641153237. The next prime is 641153297. The reversal of 641153260 is 62351146.

641153260 = T₄₈₀₁ + T₄₈₀₂ + ... + T₄₈₅₅.

It is a super-2 number, since 2×641153260² = 822155005617255200, which 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, 10612 + ... + 37348.

It is an arithmetic number, because the mean of its divisors is an integer number (30882390).

Almost surely, 2^641153260 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641153260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741177360).

641153260 is an abundant number, since it is smaller than the sum of its proper divisors (841201460).

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

641153260 is a wasteful number, since it uses less digits than its factorization.

641153260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26866 (or 26864 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 641153260 is about 25321.0043244734. The cubic root of 641153260 is about 862.2911952707.

The spelling of 641153260 in words is "six hundred forty-one million, one hundred fifty-three thousand, two hundred sixty".