64506441732 has 24 divisors (see below), whose sum is σ = 150535370496. Its totient is φ = 21499241568.

The previous prime is 64506441731. The next prime is 64506441749. The reversal of 64506441732 is 23714460546.

It is a happy number.

It is a super-2 number, since 2×64506441732² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64506441731) 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, 269748 + ... + 449195.

It is an arithmetic number, because the mean of its divisors is an integer number (6272307104).

Almost surely, 2^64506441732 is an apocalyptic number.

It is an amenable number.

64506441732 is an abundant number, since it is smaller than the sum of its proper divisors (86028928764).

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

64506441732 is a wasteful number, since it uses less digits than its factorization.

64506441732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726427 (or 726425 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 64506441732 in words is "sixty-four billion, five hundred six million, four hundred forty-one thousand, seven hundred thirty-two".