64779624 has 96 divisors (see below), whose sum is σ = 215953920. Its totient is φ = 17083008.

The previous prime is 64779601. The next prime is 64779643. The reversal of 64779624 is 42697746.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 64779624.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1609 + ... + 11495.

It is an arithmetic number, because the mean of its divisors is an integer number (2249520).

Almost surely, 2^64779624 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 64779624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107976960).

64779624 is an abundant number, since it is smaller than the sum of its proper divisors (151174296).

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

64779624 is a wasteful number, since it uses less digits than its factorization.

64779624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9919 (or 9912 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 64779624 is about 8048.5790050170. The cubic root of 64779624 is about 401.6176657414.

The spelling of 64779624 in words is "sixty-four million, seven hundred seventy-nine thousand, six hundred twenty-four".