72700427709 has 48 divisors (see below), whose sum is σ = 130431100800. Its totient is φ = 37995619968.

The previous prime is 72700427581. The next prime is 72700427743. The reversal of 72700427709 is 90772400727.

It is a happy number.

It is not a de Polignac number, because 72700427709 - 2⁷ = 72700427581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72700427309) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317919 + ... + 496460.

It is an arithmetic number, because the mean of its divisors is an integer number (2717314600).

Almost surely, 2^72700427709 is an apocalyptic number.

It is an amenable number.

72700427709 is a deficient number, since it is larger than the sum of its proper divisors (57730673091).

72700427709 is a wasteful number, since it uses less digits than its factorization.

72700427709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814514 (or 814511 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 45.

The spelling of 72700427709 in words is "seventy-two billion, seven hundred million, four hundred twenty-seven thousand, seven hundred nine".