77759436949 has 4 divisors (see below), whose sum is σ = 77765852736. Its totient is φ = 77753021164.

The previous prime is 77759436943. The next prime is 77759436973. The reversal of 77759436949 is 94963495777.

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 a cyclic number.

It is not a de Polignac number, because 77759436949 - 2¹¹ = 77759434901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77759436943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3189679 + ... + 3213964.

It is an arithmetic number, because the mean of its divisors is an integer number (19441463184).

Almost surely, 2^77759436949 is an apocalyptic number.

It is an amenable number.

77759436949 is a deficient number, since it is larger than the sum of its proper divisors (6415787).

77759436949 is a wasteful number, since it uses less digits than its factorization.

77759436949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6415786.

The product of its digits is 360067680, while the sum is 70.

The spelling of 77759436949 in words is "seventy-seven billion, seven hundred fifty-nine million, four hundred thirty-six thousand, nine hundred forty-nine".