72779503178 has 8 divisors (see below), whose sum is σ = 109230487968. Its totient is φ = 36369340524.

The previous prime is 72779503151. The next prime is 72779503193. The reversal of 72779503178 is 87130597727.

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

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, 10201076 + ... + 10208207.

It is an arithmetic number, because the mean of its divisors is an integer number (13653810996).

Almost surely, 2^72779503178 is an apocalyptic number.

72779503178 is a deficient number, since it is larger than the sum of its proper divisors (36450984790).

72779503178 is a wasteful number, since it uses less digits than its factorization.

72779503178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20411068.

The product of its (nonzero) digits is 5186160, while the sum is 56.

The spelling of 72779503178 in words is "seventy-two billion, seven hundred seventy-nine million, five hundred three thousand, one hundred seventy-eight".