77406172722 has 30 divisors (see below), whose sum is σ = 173455099983. Its totient is φ = 25800877188.

The previous prime is 77406172717. The next prime is 77406172771. The reversal of 77406172722 is 22727160477.

77406172722 is a `hidden beast` number, since 7 + 7 + 4 + 0 + 617 + 2 + 7 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38703086361 + 38703086361 = 196731^2 + 196731^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=196731.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3530229 + ... + 3552087.

Almost surely, 2^77406172722 is an apocalyptic number.

77406172722 is an abundant number, since it is smaller than the sum of its proper divisors (96048927261).

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

77406172722 is an frugal number, since it uses more digits than its factorization.

77406172722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43732 (or 21864 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 45.

The spelling of 77406172722 in words is "seventy-seven billion, four hundred six million, one hundred seventy-two thousand, seven hundred twenty-two".