72011536 has 10 divisors (see below), whose sum is σ = 139522382. Its totient is φ = 36005760.

The previous prime is 72011519. The next prime is 72011549. The reversal of 72011536 is 63511027.

It can be written as a sum of positive squares in only one way, i.e., 70896400 + 1115136 = 8420^2 + 1056^2 .

It is a super-2 number, since 2×72011536² = 10371322634158592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72011536.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2250345 + ... + 2250376.

Almost surely, 2^72011536 is an apocalyptic number.

It is an amenable number.

72011536 is a deficient number, since it is larger than the sum of its proper divisors (67510846).

72011536 is a wasteful number, since it uses less digits than its factorization.

72011536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500729 (or 4500723 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 72011536 is about 8485.9611123314. The cubic root of 72011536 is about 416.0389818007.

The spelling of 72011536 in words is "seventy-two million, eleven thousand, five hundred thirty-six".