72507713609 has 4 divisors (see below), whose sum is σ = 72716669904. Its totient is φ = 72298757316.

The previous prime is 72507713599. The next prime is 72507713687. The reversal of 72507713609 is 90631770527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72507713609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72507713689) 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 3 ways as a sum of consecutive naturals, for example, 104477627 + ... + 104478320.

It is an arithmetic number, because the mean of its divisors is an integer number (18179167476).

Almost surely, 2^72507713609 is an apocalyptic number.

It is an amenable number.

72507713609 is a deficient number, since it is larger than the sum of its proper divisors (208956295).

72507713609 is a wasteful number, since it uses less digits than its factorization.

72507713609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208956294.

The product of its (nonzero) digits is 555660, while the sum is 47.

The spelling of 72507713609 in words is "seventy-two billion, five hundred seven million, seven hundred thirteen thousand, six hundred nine".