72540016 has 20 divisors (see below), whose sum is σ = 141914032. Its totient is φ = 35917056.

The previous prime is 72540007. The next prime is 72540019. The reversal of 72540016 is 61004527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72540019) 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, 20361 + ... + 23656.

Almost surely, 2^72540016 is an apocalyptic number.

It is an amenable number.

72540016 is a deficient number, since it is larger than the sum of its proper divisors (69374016).

72540016 is a wasteful number, since it uses less digits than its factorization.

72540016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44128 (or 44122 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 72540016 is about 8517.0426792403. The cubic root of 72540016 is about 417.0542478600.

The spelling of 72540016 in words is "seventy-two million, five hundred forty thousand, sixteen".