64986624 has 100 divisors (see below), whose sum is σ = 194091744. Its totient is φ = 21648384.

The previous prime is 64986619. The next prime is 64986629. The reversal of 64986624 is 42668946.

It is an interprime number because it is at equal distance from previous prime (64986619) and next prime (64986629).

It is a super-2 number, since 2×64986624² = 8446522597834752, which contains 22 as substring.

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 64986624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64986629) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40689 + ... + 42255.

Almost surely, 2^64986624 is an apocalyptic number.

64986624 is a gapful number since it is divisible by the number (64) 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 64986624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97045872).

64986624 is an abundant number, since it is smaller than the sum of its proper divisors (129105120).

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

64986624 is an equidigital number, since it uses as much as digits as its factorization.

64986624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597 (or 1572 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 64986624 is about 8061.4281613124. The cubic root of 64986624 is about 402.0449938500.

The spelling of 64986624 in words is "sixty-four million, nine hundred eighty-six thousand, six hundred twenty-four".