77118432391679 has 4 divisors (see below), whose sum is σ = 88135351304784. Its totient is φ = 66101513478576.

The previous prime is 77118432391589. The next prime is 77118432391753. The reversal of 77118432391679 is 97619323481177.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77118432391679 is a prime.

It is a super-2 number, since 2×77118432391679² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77118432393679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5508459456542 + ... + 5508459456555.

It is an arithmetic number, because the mean of its divisors is an integer number (22033837826196).

Almost surely, 2^{77118432391679} is an apocalyptic number.

77118432391679 is a deficient number, since it is larger than the sum of its proper divisors (11016918913105).

77118432391679 is a wasteful number, since it uses less digits than its factorization.

77118432391679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11016918913104.

The product of its digits is 96018048, while the sum is 68.

The spelling of 77118432391679 in words is "seventy-seven trillion, one hundred eighteen billion, four hundred thirty-two million, three hundred ninety-one thousand, six hundred seventy-nine".