72290543985 has 128 divisors (see below), whose sum is σ = 142987991040. Its totient is φ = 34356960000.

The previous prime is 72290543971. The next prime is 72290544043. The reversal of 72290543985 is 58934509227.

72290543985 is a `hidden beast` number, since 7 + 2 + 2 + 9 + 0 + 543 + 98 + 5 = 666.

It is not a de Polignac number, because 72290543985 - 2⁸ = 72290543729 is a prime.

It is a super-3 number, since 3×72290543985³ (a number of 34 digits) contains 333 as substring.

It is a Curzon 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 127 ways as a sum of consecutive naturals, for example, 29982430 + ... + 29984840.

It is an arithmetic number, because the mean of its divisors is an integer number (1117093680).

Almost surely, 2^72290543985 is an apocalyptic number.

It is an amenable number.

72290543985 is a deficient number, since it is larger than the sum of its proper divisors (70697447055).

72290543985 is a wasteful number, since it uses less digits than its factorization.

72290543985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828 (or 2822 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 72290543985 in words is "seventy-two billion, two hundred ninety million, five hundred forty-three thousand, nine hundred eighty-five".