64411632261 has 24 divisors (see below), whose sum is σ = 95325781824. Its totient is φ = 41886047040.

The previous prime is 64411632253. The next prime is 64411632277. The reversal of 64411632261 is 16223611446.

64411632261 is a `hidden beast` number, since 6 + 4 + 4 + 11 + 632 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 64411632261 - 2³ = 64411632253 is a prime.

It is a super-4 number, since 4×64411632261⁴ (a number of 44 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64411632281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2550880 + ... + 2576006.

It is an arithmetic number, because the mean of its divisors is an integer number (3971907576).

Almost surely, 2^64411632261 is an apocalyptic number.

It is an amenable number.

64411632261 is a deficient number, since it is larger than the sum of its proper divisors (30914149563).

64411632261 is a wasteful number, since it uses less digits than its factorization.

64411632261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32121 (or 32118 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The spelling of 64411632261 in words is "sixty-four billion, four hundred eleven million, six hundred thirty-two thousand, two hundred sixty-one".