72757769385 has 16 divisors (see below), whose sum is σ = 133042778496. Its totient is φ = 33260694528.

The previous prime is 72757769317. The next prime is 72757769387. The reversal of 72757769385 is 58396775727.

It is a happy number.

It is not a de Polignac number, because 72757769385 - 2⁹ = 72757768873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72757769387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346465464 + ... + 346465673.

It is an arithmetic number, because the mean of its divisors is an integer number (8315173656).

Almost surely, 2^72757769385 is an apocalyptic number.

It is an amenable number.

72757769385 is a deficient number, since it is larger than the sum of its proper divisors (60285009111).

72757769385 is a wasteful number, since it uses less digits than its factorization.

72757769385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692931152.

The product of its digits is 155584800, while the sum is 66.

The spelling of 72757769385 in words is "seventy-two billion, seven hundred fifty-seven million, seven hundred sixty-nine thousand, three hundred eighty-five".