64789532032 has 16 divisors (see below), whose sum is σ = 129072896100. Its totient is φ = 32394765952.

The previous prime is 64789532023. The next prime is 64789532039. The reversal of 64789532032 is 23023598746.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64789532039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253083982 + ... + 253084237.

Almost surely, 2^64789532032 is an apocalyptic number.

It is an amenable number.

64789532032 is a deficient number, since it is larger than the sum of its proper divisors (64283364068).

64789532032 is an equidigital number, since it uses as much as digits as its factorization.

64789532032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506168233 (or 506168221 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 64789532032 in words is "sixty-four billion, seven hundred eighty-nine million, five hundred thirty-two thousand, thirty-two".