77912223487 has 8 divisors (see below), whose sum is σ = 89093349536. Its totient is φ = 66743799552.

The previous prime is 77912223481. The next prime is 77912223497. The reversal of 77912223487 is 78432221977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77912223487 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 (77912223481) 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 7 ways as a sum of consecutive naturals, for example, 3162378 + ... + 3186919.

It is an arithmetic number, because the mean of its divisors is an integer number (11136668692).

Almost surely, 2^77912223487 is an apocalyptic number.

77912223487 is a deficient number, since it is larger than the sum of its proper divisors (11181126049).

77912223487 is a wasteful number, since it uses less digits than its factorization.

77912223487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6351057.

The product of its digits is 2370816, while the sum is 52.

The spelling of 77912223487 in words is "seventy-seven billion, nine hundred twelve million, two hundred twenty-three thousand, four hundred eighty-seven".