72136615 has 8 divisors (see below), whose sum is σ = 86628240. Its totient is φ = 57666432.

The previous prime is 72136613. The next prime is 72136619. The reversal of 72136615 is 51663127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72136615 - 2¹ = 72136613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72136613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3327 + ... + 12463.

It is an arithmetic number, because the mean of its divisors is an integer number (10828530).

Almost surely, 2^72136615 is an apocalyptic number.

72136615 is a deficient number, since it is larger than the sum of its proper divisors (14491625).

72136615 is a wasteful number, since it uses less digits than its factorization.

72136615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10721.

The product of its digits is 7560, while the sum is 31.

The square root of 72136615 is about 8493.3276752990. The cubic root of 72136615 is about 416.2797193413.

The spelling of 72136615 in words is "seventy-two million, one hundred thirty-six thousand, six hundred fifteen".