72791870040 has 96 divisors (see below), whose sum is σ = 244205020800. Its totient is φ = 18784995840.

The previous prime is 72791870029. The next prime is 72791870059. The reversal of 72791870040 is 4007819727.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3250125 + ... + 3272444.

It is an arithmetic number, because the mean of its divisors is an integer number (2543802300).

Almost surely, 2^72791870040 is an apocalyptic number.

It is an amenable number.

72791870040 is an abundant number, since it is smaller than the sum of its proper divisors (171413150760).

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

72791870040 is a wasteful number, since it uses less digits than its factorization.

72791870040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522617 (or 6522610 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 72791870040 in words is "seventy-two billion, seven hundred ninety-one million, eight hundred seventy thousand, forty".