72171439498 has 8 divisors (see below), whose sum is σ = 114625227492. Its totient is φ = 33963030336.

The previous prime is 72171439493. The next prime is 72171439517. The reversal of 72171439498 is 89493417127.

It can be written as a sum of positive squares in 2 ways, for example, as 59249888569 + 12921550929 = 243413^2 + 113673^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (72171439493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061344665 + ... + 1061344732.

Almost surely, 2^72171439498 is an apocalyptic number.

72171439498 is a deficient number, since it is larger than the sum of its proper divisors (42453787994).

72171439498 is a wasteful number, since it uses less digits than its factorization.

72171439498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122689416.

The product of its digits is 3048192, while the sum is 55.

The spelling of 72171439498 in words is "seventy-two billion, one hundred seventy-one million, four hundred thirty-nine thousand, four hundred ninety-eight".