72257715603 has 20 divisors (see below), whose sum is σ = 114289983720. Its totient is φ = 45338173632.

The previous prime is 72257715601. The next prime is 72257715617. The reversal of 72257715603 is 30651775227.

72257715603 is a `hidden beast` number, since 7 + 2 + 2 + 577 + 15 + 60 + 3 = 666.

It is not a de Polignac number, because 72257715603 - 2¹ = 72257715601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72257715601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26235993 + ... + 26238746.

It is an arithmetic number, because the mean of its divisors is an integer number (5714499186).

Almost surely, 2^72257715603 is an apocalyptic number.

72257715603 is a deficient number, since it is larger than the sum of its proper divisors (42032268117).

72257715603 is a wasteful number, since it uses less digits than its factorization.

72257715603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52474768 (or 52474759 counting only the distinct ones).

The product of its (nonzero) digits is 617400, while the sum is 45.

The spelling of 72257715603 in words is "seventy-two billion, two hundred fifty-seven million, seven hundred fifteen thousand, six hundred three".