72462717722 has 4 divisors (see below), whose sum is σ = 108694076586. Its totient is φ = 36231358860.

The previous prime is 72462717667. The next prime is 72462717749. The reversal of 72462717722 is 22771726427.

It is a Cunningham number, because it is equal to 269189²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22771726427 = 4337 ⋅5250571.

It can be written as a sum of positive squares in only one way, i.e., 72462717721 + 1 = 269189^2 + 1^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18115679429 + ... + 18115679432.

Almost surely, 2^72462717722 is an apocalyptic number.

72462717722 is a deficient number, since it is larger than the sum of its proper divisors (36231358864).

72462717722 is a wasteful number, since it uses less digits than its factorization.

72462717722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36231358863.

The product of its digits is 921984, while the sum is 47.

The spelling of 72462717722 in words is "seventy-two billion, four hundred sixty-two million, seven hundred seventeen thousand, seven hundred twenty-two".