72561552 has 60 divisors (see below), whose sum is σ = 218061936. Its totient is φ = 20731200.

The previous prime is 72561547. The next prime is 72561553. The reversal of 72561552 is 25516527.

It is not an unprimeable number, because it can be changed into a prime (72561553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13074 + ... + 17777.

Almost surely, 2^72561552 is an apocalyptic number.

It is an amenable number.

72561552 is an abundant number, since it is smaller than the sum of its proper divisors (145500384).

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

72561552 is a wasteful number, since it uses less digits than its factorization.

72561552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30876 (or 30863 counting only the distinct ones).

The product of its digits is 21000, while the sum is 33.

The square root of 72561552 is about 8518.3068740214. The cubic root of 72561552 is about 417.0955160780.

The spelling of 72561552 in words is "seventy-two million, five hundred sixty-one thousand, five hundred fifty-two".