64115581332 has 24 divisors (see below), whose sum is σ = 163203298272. Its totient is φ = 19428964000.

The previous prime is 64115581307. The next prime is 64115581337. The reversal of 64115581332 is 23318551146.

64115581332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64115581332² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64115581337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242861919 + ... + 242862182.

It is an arithmetic number, because the mean of its divisors is an integer number (6800137428).

Almost surely, 2^64115581332 is an apocalyptic number.

It is an amenable number.

64115581332 is an abundant number, since it is smaller than the sum of its proper divisors (99087716940).

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

64115581332 is a wasteful number, since it uses less digits than its factorization.

64115581332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485724119 (or 485724117 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The spelling of 64115581332 in words is "sixty-four billion, one hundred fifteen million, five hundred eighty-one thousand, three hundred thirty-two".