72615705 has 16 divisors (see below), whose sum is σ = 118658304. Its totient is φ = 37904000.

The previous prime is 72615689. The next prime is 72615709. The reversal of 72615705 is 50751627.

It is not a de Polignac number, because 72615705 - 2⁴ = 72615689 is a prime.

It is a super-2 number, since 2×72615705² = 10546081225294050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72615709) 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, 50796 + ... + 52205.

It is an arithmetic number, because the mean of its divisors is an integer number (7416144).

Almost surely, 2^72615705 is an apocalyptic number.

It is an amenable number.

72615705 is a deficient number, since it is larger than the sum of its proper divisors (46042599).

72615705 is a wasteful number, since it uses less digits than its factorization.

72615705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103056.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 72615705 is about 8521.4849058131. The cubic root of 72615705 is about 417.1992503389.

The spelling of 72615705 in words is "seventy-two million, six hundred fifteen thousand, seven hundred five".