72171789480 has 128 divisors (see below), whose sum is σ = 274940179200. Its totient is φ = 16496407296.

The previous prime is 72171789479. The next prime is 72171789497. The reversal of 72171789480 is 8498717127.

72171789480 is a `hidden beast` number, since 7 + 21 + 71 + 78 + 9 + 480 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4765707 + ... + 4780826.

It is an arithmetic number, because the mean of its divisors is an integer number (2147970150).

Almost surely, 2^72171789480 is an apocalyptic number.

72171789480 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72171789480 is an abundant number, since it is smaller than the sum of its proper divisors (202768389720).

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

72171789480 is a wasteful number, since it uses less digits than its factorization.

72171789480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9546560 (or 9546550 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 54.

The spelling of 72171789480 in words is "seventy-two billion, one hundred seventy-one million, seven hundred eighty-nine thousand, four hundred eighty".