7231536864 has 72 divisors (see below), whose sum is σ = 20623894200. Its totient is φ = 2403571968.

The previous prime is 7231536859. The next prime is 7231536941. The reversal of 7231536864 is 4686351327.

7231536864 is a `hidden beast` number, since 7 + 2 + 31 + 536 + 86 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64539 + ... + 136485.

It is an arithmetic number, because the mean of its divisors is an integer number (286442975).

Almost surely, 2^7231536864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7231536864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10311947100).

7231536864 is an abundant number, since it is smaller than the sum of its proper divisors (13392357336).

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

7231536864 is a wasteful number, since it uses less digits than its factorization.

7231536864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72312 (or 72301 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 7231536864 is about 85038.4434476549. The cubic root of 7231536864 is about 1933.7939691410.

The spelling of 7231536864 in words is "seven billion, two hundred thirty-one million, five hundred thirty-six thousand, eight hundred sixty-four".