72178086178 has 8 divisors (see below), whose sum is σ = 118109595600. Its totient is φ = 32808220980.

The previous prime is 72178086161. The next prime is 72178086241. The reversal of 72178086178 is 87168087127.

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

It is a super-2 number, since 2×72178086178² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640411028 + ... + 1640411071.

It is an arithmetic number, because the mean of its divisors is an integer number (14763699450).

Almost surely, 2^72178086178 is an apocalyptic number.

72178086178 is a deficient number, since it is larger than the sum of its proper divisors (45931509422).

72178086178 is a wasteful number, since it uses less digits than its factorization.

72178086178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280822112.

The product of its (nonzero) digits is 2107392, while the sum is 55.

The spelling of 72178086178 in words is "seventy-two billion, one hundred seventy-eight million, eighty-six thousand, one hundred seventy-eight".