64994520 has 64 divisors (see below), whose sum is σ = 196812000. Its totient is φ = 17169408.

The previous prime is 64994513. The next prime is 64994537. The reversal of 64994520 is 2549946.

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, 10596 + ... + 15564.

Almost surely, 2^64994520 is an apocalyptic number.

64994520 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 64994520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98406000).

64994520 is an abundant number, since it is smaller than the sum of its proper divisors (131817480).

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

64994520 is a wasteful number, since it uses less digits than its factorization.

64994520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092 (or 5088 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 64994520 is about 8061.9178859624. The cubic root of 64994520 is about 402.0612762710.

The spelling of 64994520 in words is "sixty-four million, nine hundred ninety-four thousand, five hundred twenty".