77399584055 has 4 divisors (see below), whose sum is σ = 92879500872. Its totient is φ = 61919667240.

The previous prime is 77399584049. The next prime is 77399584057. The reversal of 77399584055 is 55048599377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55048599377 = 283 ⋅194518019.

It is not a de Polignac number, because 77399584055 - 2⁴ = 77399584039 is a prime.

It is a super-2 number, since 2×77399584055² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77399584057) 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, 7739958401 + ... + 7739958410.

It is an arithmetic number, because the mean of its divisors is an integer number (23219875218).

Almost surely, 2^77399584055 is an apocalyptic number.

77399584055 is a deficient number, since it is larger than the sum of its proper divisors (15479916817).

77399584055 is a wasteful number, since it uses less digits than its factorization.

77399584055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15479916816.

The product of its (nonzero) digits is 47628000, while the sum is 62.

The spelling of 77399584055 in words is "seventy-seven billion, three hundred ninety-nine million, five hundred eighty-four thousand, fifty-five".