72687825698 has 4 divisors (see below), whose sum is σ = 109031738550. Its totient is φ = 36343912848.

The previous prime is 72687825659. The next prime is 72687825713. The reversal of 72687825698 is 89652878627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71697024169 + 990801529 = 267763^2 + 31477^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18171956423 + ... + 18171956426.

Almost surely, 2^72687825698 is an apocalyptic number.

72687825698 is a deficient number, since it is larger than the sum of its proper divisors (36343912852).

72687825698 is a wasteful number, since it uses less digits than its factorization.

72687825698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36343912851.

The product of its digits is 162570240, while the sum is 68.

The spelling of 72687825698 in words is "seventy-two billion, six hundred eighty-seven million, eight hundred twenty-five thousand, six hundred ninety-eight".