72422851698 has 54 divisors (see below), whose sum is σ = 158412053709. Its totient is φ = 23912979552.

The previous prime is 72422851691. The next prime is 72422851759. The reversal of 72422851698 is 89615822427.

It can be written as a sum of positive squares in 2 ways, for example, as 71865277929 + 557573769 = 268077^2 + 23613^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=190293.

It is not an unprimeable number, because it can be changed into a prime (72422851691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 156420615 + ... + 156421077.

Almost surely, 2^72422851698 is an apocalyptic number.

72422851698 is an abundant number, since it is smaller than the sum of its proper divisors (85989202011).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72422851698 is an equidigital number, since it uses as much as digits as its factorization.

72422851698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208 (or 605 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

It can be divided in two parts, 72422 and 851698, that added together give a triangular number (924120 = T₁₃₅₉).

The spelling of 72422851698 in words is "seventy-two billion, four hundred twenty-two million, eight hundred fifty-one thousand, six hundred ninety-eight".