77406172723 has 4 divisors (see below), whose sum is σ = 84443097528. Its totient is φ = 70369247920.

The previous prime is 77406172717. The next prime is 77406172771. The reversal of 77406172723 is 32727160477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32727160477 = 11 ⋅2975196407.

It is a cyclic number.

It is not a de Polignac number, because 77406172723 - 2¹⁷ = 77406041651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77406172423) 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, 3518462386 + ... + 3518462407.

It is an arithmetic number, because the mean of its divisors is an integer number (21110774382).

Almost surely, 2^77406172723 is an apocalyptic number.

77406172723 is a deficient number, since it is larger than the sum of its proper divisors (7036924805).

77406172723 is a wasteful number, since it uses less digits than its factorization.

77406172723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036924804.

The product of its (nonzero) digits is 691488, while the sum is 46.

The spelling of 77406172723 in words is "seventy-seven billion, four hundred six million, one hundred seventy-two thousand, seven hundred twenty-three".