72528517494 has 24 divisors (see below), whose sum is σ = 166388952600. Its totient is φ = 22754044608.

The previous prime is 72528517489. The next prime is 72528517517. The reversal of 72528517494 is 49471582527.

72528517494 is a `hidden beast` number, since 72 + 5 + 2 + 85 + 1 + 7 + 494 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72528517494.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 118510344 + ... + 118510955.

It is an arithmetic number, because the mean of its divisors is an integer number (6932873025).

Almost surely, 2^72528517494 is an apocalyptic number.

72528517494 is an abundant number, since it is smaller than the sum of its proper divisors (93860435106).

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

72528517494 is a wasteful number, since it uses less digits than its factorization.

72528517494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237021324 (or 237021321 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 72528517494 in words is "seventy-two billion, five hundred twenty-eight million, five hundred seventeen thousand, four hundred ninety-four".