77881986983 has 2 divisors, whose sum is σ = 77881986984. Its totient is φ = 77881986982.

The previous prime is 77881986947. The next prime is 77881987013. The reversal of 77881986983 is 38968918877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77881986983 - 2³⁰ = 76808245159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77881986983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77881986913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38940993491 + 38940993492.

It is an arithmetic number, because the mean of its divisors is an integer number (38940993492).

Almost surely, 2^77881986983 is an apocalyptic number.

77881986983 is a deficient number, since it is larger than the sum of its proper divisors (1).

77881986983 is an equidigital number, since it uses as much as digits as its factorization.

77881986983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 292626432, while the sum is 74.

The spelling of 77881986983 in words is "seventy-seven billion, eight hundred eighty-one million, nine hundred eighty-six thousand, nine hundred eighty-three".