77807560331077 has 4 divisors (see below), whose sum is σ = 81190497736800. Its totient is φ = 74424622925356.

The previous prime is 77807560331029. The next prime is 77807560331099. The reversal of 77807560331077 is 77013306570877.

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 77807560331077 - 2¹¹ = 77807560329029 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 (77807560331027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691468702827 + ... + 1691468702872.

It is an arithmetic number, because the mean of its divisors is an integer number (20297624434200).

Almost surely, 2^{77807560331077} is an apocalyptic number.

It is an amenable number.

77807560331077 is a deficient number, since it is larger than the sum of its proper divisors (3382937405723).

77807560331077 is a wasteful number, since it uses less digits than its factorization.

77807560331077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382937405722.

The product of its (nonzero) digits is 36303120, while the sum is 61.

The spelling of 77807560331077 in words is "seventy-seven trillion, eight hundred seven billion, five hundred sixty million, three hundred thirty-one thousand, seventy-seven".