72561108 has 12 divisors (see below), whose sum is σ = 169309280. Its totient is φ = 24187032.

The previous prime is 72561079. The next prime is 72561109. The reversal of 72561108 is 80116527.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×72561108² = 10530228788375328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72561109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3023368 + ... + 3023391.

Almost surely, 2^72561108 is an apocalyptic number.

It is an amenable number.

72561108 is an abundant number, since it is smaller than the sum of its proper divisors (96748172).

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

72561108 is a wasteful number, since it uses less digits than its factorization.

72561108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6046766 (or 6046764 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 72561108 is about 8518.2808124644. The cubic root of 72561108 is about 417.0946653484.

The spelling of 72561108 in words is "seventy-two million, five hundred sixty-one thousand, one hundred eight".