64820452732 has 48 divisors (see below), whose sum is σ = 132935604480. Its totient is φ = 27075542400.

The previous prime is 64820452679. The next prime is 64820452747. The reversal of 64820452732 is 23725402846.

It is a super-4 number, since 4×64820452732⁴ (a number of 44 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1142107 + ... + 1197517.

It is an arithmetic number, because the mean of its divisors is an integer number (2769491760).

Almost surely, 2^64820452732 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 64820452732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66467802240).

64820452732 is an abundant number, since it is smaller than the sum of its proper divisors (68115151748).

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

64820452732 is a wasteful number, since it uses less digits than its factorization.

64820452732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56482 (or 56480 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 64820452732 in words is "sixty-four billion, eight hundred twenty million, four hundred fifty-two thousand, seven hundred thirty-two".