72523099808 has 24 divisors (see below), whose sum is σ = 142890701940. Its totient is φ = 36233397760.

The previous prime is 72523099799. The next prime is 72523099841. The reversal of 72523099808 is 80899032527.

It can be written as a sum of positive squares in 2 ways, for example, as 68210813584 + 4312286224 = 261172^2 + 65668^2 .

It is a super-2 number, since 2×72523099808² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72523099808.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 837863 + ... + 920358.

Almost surely, 2^72523099808 is an apocalyptic number.

It is an amenable number.

72523099808 is a deficient number, since it is larger than the sum of its proper divisors (70367602132).

72523099808 is a wasteful number, since it uses less digits than its factorization.

72523099808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759520 (or 1759512 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 72523099808 in words is "seventy-two billion, five hundred twenty-three million, ninety-nine thousand, eight hundred eight".