72011613663 has 36 divisors (see below), whose sum is σ = 114414431040. Its totient is φ = 43612124160.

The previous prime is 72011613643. The next prime is 72011613701. The reversal of 72011613663 is 36631611027.

72011613663 is a `hidden beast` number, since 7 + 20 + 11 + 613 + 6 + 6 + 3 = 666.

It is not a de Polignac number, because 72011613663 - 2¹⁰ = 72011612639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72011613643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1544095 + ... + 1590047.

It is an arithmetic number, because the mean of its divisors is an integer number (3178178640).

Almost surely, 2^72011613663 is an apocalyptic number.

72011613663 is a deficient number, since it is larger than the sum of its proper divisors (42402817377).

72011613663 is a wasteful number, since it uses less digits than its factorization.

72011613663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47420 (or 47406 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 72011613663 in words is "seventy-two billion, eleven million, six hundred thirteen thousand, six hundred sixty-three".