72611745 has 16 divisors (see below), whose sum is σ = 116285760. Its totient is φ = 38690624.

The previous prime is 72611731. The next prime is 72611753. The reversal of 72611745 is 54711627.

It is a cyclic number.

It is not a de Polignac number, because 72611745 - 2⁴ = 72611729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26866 + ... + 29444.

It is an arithmetic number, because the mean of its divisors is an integer number (7267860).

Almost surely, 2^72611745 is an apocalyptic number.

It is an amenable number.

72611745 is a deficient number, since it is larger than the sum of its proper divisors (43674015).

72611745 is a wasteful number, since it uses less digits than its factorization.

72611745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464.

The product of its digits is 11760, while the sum is 33.

The square root of 72611745 is about 8521.2525487747. The cubic root of 72611745 is about 417.1916664006.

The spelling of 72611745 in words is "seventy-two million, six hundred eleven thousand, seven hundred forty-five".