641132536 has 24 divisors (see below), whose sum is σ = 1321344360. Its totient is φ = 291423440.

The previous prime is 641132519. The next prime is 641132617. The reversal of 641132536 is 635231146.

It is a super-2 number, since 2×641132536² = 822101857435582592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641132498 and 641132507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 330196 + ... + 332131.

It is an arithmetic number, because the mean of its divisors is an integer number (55056015).

Almost surely, 2^641132536 is an apocalyptic number.

It is an amenable number.

641132536 is an abundant number, since it is smaller than the sum of its proper divisors (680211824).

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

641132536 is a wasteful number, since it uses less digits than its factorization.

641132536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662355 (or 662340 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 641132536 is about 25320.5950956924. The cubic root of 641132536 is about 862.2819045564.

The spelling of 641132536 in words is "six hundred forty-one million, one hundred thirty-two thousand, five hundred thirty-six".