64791522 has 64 divisors (see below), whose sum is σ = 153740160. Its totient is φ = 20155392.

The previous prime is 64791511. The next prime is 64791523. The reversal of 64791522 is 22519746.

64791522 is a `hidden beast` number, since 6 + 47 + 91 + 522 = 666.

It is not an unprimeable number, because it can be changed into a prime (64791523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149418 + ... + 149850.

It is an arithmetic number, because the mean of its divisors is an integer number (2402190).

Almost surely, 2^64791522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64791522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76870080).

64791522 is an abundant number, since it is smaller than the sum of its proper divisors (88948638).

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

64791522 is a wasteful number, since it uses less digits than its factorization.

64791522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 618 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 64791522 is about 8049.3181077654. The cubic root of 64791522 is about 401.6422524565.

It can be divided in two parts, 6479 and 1522, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 64791522 in words is "sixty-four million, seven hundred ninety-one thousand, five hundred twenty-two".