72178086179 has 4 divisors (see below), whose sum is σ = 75976932840. Its totient is φ = 68379239520.

The previous prime is 72178086161. The next prime is 72178086241. The reversal of 72178086179 is 97168087127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97168087127 = 17 ⋅5715769831.

It is a cyclic number.

It is not a de Polignac number, because 72178086179 - 2¹⁶ = 72178020643 is a prime.

It is a super-2 number, since 2×72178086179² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72178086119) 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, 1899423302 + ... + 1899423339.

It is an arithmetic number, because the mean of its divisors is an integer number (18994233210).

Almost surely, 2^72178086179 is an apocalyptic number.

72178086179 is a deficient number, since it is larger than the sum of its proper divisors (3798846661).

72178086179 is a wasteful number, since it uses less digits than its factorization.

72178086179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3798846660.

The product of its (nonzero) digits is 2370816, while the sum is 56.

The spelling of 72178086179 in words is "seventy-two billion, one hundred seventy-eight million, eighty-six thousand, one hundred seventy-nine".