64013502 has 24 divisors (see below), whose sum is σ = 148930056. Its totient is φ = 18289488.

The previous prime is 64013447. The next prime is 64013557. The reversal of 64013502 is 20531046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64013447) and next prime (64013557).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108573 + ... + 109160.

It is an arithmetic number, because the mean of its divisors is an integer number (6205419).

Almost surely, 2^64013502 is an apocalyptic number.

64013502 is an abundant number, since it is smaller than the sum of its proper divisors (84916554).

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

64013502 is a wasteful number, since it uses less digits than its factorization.

64013502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217752 (or 217745 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 64013502 is about 8000.8438304969. The cubic root of 64013502 is about 400.0281271888.

Adding to 64013502 its reverse (20531046), we get a palindrome (84544548).

The spelling of 64013502 in words is "sixty-four million, thirteen thousand, five hundred two".