77117573458 has 4 divisors (see below), whose sum is σ = 115676360190. Its totient is φ = 38558786728.

The previous prime is 77117573437. The next prime is 77117573461. The reversal of 77117573458 is 85437571177.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61745789169 + 15371784289 = 248487^2 + 123983^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77117573399 and 77117573408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19279393363 + ... + 19279393366.

Almost surely, 2^77117573458 is an apocalyptic number.

77117573458 is a deficient number, since it is larger than the sum of its proper divisors (38558786732).

77117573458 is a wasteful number, since it uses less digits than its factorization.

77117573458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38558786731.

The product of its digits is 5762400, while the sum is 55.

The spelling of 77117573458 in words is "seventy-seven billion, one hundred seventeen million, five hundred seventy-three thousand, four hundred fifty-eight".