73156560 has 160 divisors (see below), whose sum is σ = 245341440. Its totient is φ = 17977344.

The previous prime is 73156553. The next prime is 73156561. The reversal of 73156560 is 6565137.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73156561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159852 + ... + 160308.

It is an arithmetic number, because the mean of its divisors is an integer number (1533384).

Almost surely, 2^73156560 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 73156560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122670720).

73156560 is an abundant number, since it is smaller than the sum of its proper divisors (172184880).

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

73156560 is a wasteful number, since it uses less digits than its factorization.

73156560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 73156560 is about 8553.1608192527. The cubic root of 73156560 is about 418.2324813454.

It can be divided in two parts, 731 and 56560, that added together give a triangular number (57291 = T₃₃₈).

The spelling of 73156560 in words is "seventy-three million, one hundred fifty-six thousand, five hundred sixty".