72785591280 has 80 divisors (see below), whose sum is σ = 250705932960. Its totient is φ = 19409490432.

The previous prime is 72785591231. The next prime is 72785591287. The reversal of 72785591280 is 8219558727.

72785591280 is a `hidden beast` number, since 7 + 2 + 7 + 8 + 559 + 1 + 2 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72785591287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16846357 + ... + 16850676.

It is an arithmetic number, because the mean of its divisors is an integer number (3133824162).

Almost surely, 2^72785591280 is an apocalyptic number.

It is an amenable number.

72785591280 is an abundant number, since it is smaller than the sum of its proper divisors (177920341680).

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

72785591280 is a wasteful number, since it uses less digits than its factorization.

72785591280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33697055 (or 33697043 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 72785591280 in words is "seventy-two billion, seven hundred eighty-five million, five hundred ninety-one thousand, two hundred eighty".