72359581 has 16 divisors (see below), whose sum is σ = 88041600. Its totient is φ = 58088448.

The previous prime is 72359569. The next prime is 72359591. The reversal of 72359581 is 18595327.

It is a cyclic number.

It is not a de Polignac number, because 72359581 - 2¹⁹ = 71835293 is a prime.

It is a super-2 number, since 2×72359581² = 10471817924991122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72359501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8781 + ... + 14893.

It is an arithmetic number, because the mean of its divisors is an integer number (5502600).

Almost surely, 2^72359581 is an apocalyptic number.

It is an amenable number.

72359581 is a deficient number, since it is larger than the sum of its proper divisors (15682019).

72359581 is a wasteful number, since it uses less digits than its factorization.

72359581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228.

The product of its digits is 75600, while the sum is 40.

The square root of 72359581 is about 8506.4434989013. The cubic root of 72359581 is about 416.7081691637.

The spelling of 72359581 in words is "seventy-two million, three hundred fifty-nine thousand, five hundred eighty-one".