72215255599 has 6 divisors (see below), whose sum is σ = 72255683240. Its totient is φ = 72174850356.

The previous prime is 72215255591. The next prime is 72215255633. The reversal of 72215255599 is 99555251227.

It is not a de Polignac number, because 72215255599 - 2³ = 72215255591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72215255591) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3907222 + ... + 3925660.

Almost surely, 2^72215255599 is an apocalyptic number.

72215255599 is a deficient number, since it is larger than the sum of its proper divisors (40427641).

72215255599 is an frugal number, since it uses more digits than its factorization.

72215255599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22397 (or 20418 counting only the distinct ones).

The product of its digits is 2835000, while the sum is 52.

The spelling of 72215255599 in words is "seventy-two billion, two hundred fifteen million, two hundred fifty-five thousand, five hundred ninety-nine".