73564656 has 80 divisors (see below), whose sum is σ = 218259840. Its totient is φ = 21116160.

The previous prime is 73564651. The next prime is 73564691. The reversal of 73564656 is 65646537.

It is a super-2 number, since 2×73564656² = 10823517224796672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73564651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6366 + ... + 13698.

It is an arithmetic number, because the mean of its divisors is an integer number (2728248).

Almost surely, 2^73564656 is an apocalyptic number.

73564656 is a gapful number since it is divisible by the number (76) 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 73564656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109129920).

73564656 is an abundant number, since it is smaller than the sum of its proper divisors (144695184).

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

73564656 is a wasteful number, since it uses less digits than its factorization.

73564656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374 (or 7368 counting only the distinct ones).

The product of its digits is 453600, while the sum is 42.

The square root of 73564656 is about 8576.9840853298. The cubic root of 73564656 is about 419.0087280285.

The spelling of 73564656 in words is "seventy-three million, five hundred sixty-four thousand, six hundred fifty-six".