77977988373 has 4 divisors (see below), whose sum is σ = 103970651168. Its totient is φ = 51985325580.

The previous prime is 77977988359. The next prime is 77977988489. The reversal of 77977988373 is 37388977977.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 77977988373 - 2²⁶ = 77910879509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77977988295 and 77977988304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77977988323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12996331393 + ... + 12996331398.

It is an arithmetic number, because the mean of its divisors is an integer number (25992662792).

Almost surely, 2^77977988373 is an apocalyptic number.

It is an amenable number.

77977988373 is a deficient number, since it is larger than the sum of its proper divisors (25992662795).

77977988373 is a wasteful number, since it uses less digits than its factorization.

77977988373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25992662794.

The product of its digits is 784147392, while the sum is 75.

The spelling of 77977988373 in words is "seventy-seven billion, nine hundred seventy-seven million, nine hundred eighty-eight thousand, three hundred seventy-three".