64602439680 has 136 divisors (see below), whose sum is σ = 206729375472. Its totient is φ = 17227055104.

The previous prime is 64602439669. The next prime is 64602439709. The reversal of 64602439680 is 8693420646.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950182 + ... + 1015898.

Almost surely, 2^64602439680 is an apocalyptic number.

64602439680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64602439680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103364687736).

64602439680 is an abundant number, since it is smaller than the sum of its proper divisors (142126935792).

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

64602439680 is an frugal number, since it uses more digits than its factorization.

64602439680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65757 (or 65727 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 64602439680 in words is "sixty-four billion, six hundred two million, four hundred thirty-nine thousand, six hundred eighty".