64821031232 has 14 divisors (see below), whose sum is σ = 128629233978. Its totient is φ = 32410515584.

The previous prime is 64821031207. The next prime is 64821031243. The reversal of 64821031232 is 23213012846.

It can be written as a sum of positive squares in only one way, i.e., 39305441536 + 25515589696 = 198256^2 + 159736^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506414243 + ... + 506414370.

It is an arithmetic number, because the mean of its divisors is an integer number (9187802427).

Almost surely, 2^64821031232 is an apocalyptic number.

It is an amenable number.

64821031232 is a deficient number, since it is larger than the sum of its proper divisors (63808202746).

64821031232 is a wasteful number, since it uses less digits than its factorization.

64821031232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012828625 (or 1012828615 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 64821031232 in words is "sixty-four billion, eight hundred twenty-one million, thirty-one thousand, two hundred thirty-two".