72061615 has 16 divisors (see below), whose sum is σ = 87674400. Its totient is φ = 56855680.

The previous prime is 72061573. The next prime is 72061621. The reversal of 72061615 is 51616027.

It is not a de Polignac number, because 72061615 - 2⁹ = 72061103 is a prime.

It is a congruent number.

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, 146520 + ... + 147010.

It is an arithmetic number, because the mean of its divisors is an integer number (5479650).

Almost surely, 2^72061615 is an apocalyptic number.

72061615 is a deficient number, since it is larger than the sum of its proper divisors (15612785).

72061615 is a wasteful number, since it uses less digits than its factorization.

72061615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 72061615 is about 8488.9112965091. The cubic root of 72061615 is about 416.1354014832.

The spelling of 72061615 in words is "seventy-two million, sixty-one thousand, six hundred fifteen".