77970059647 has 4 divisors (see below), whose sum is σ = 78909458040. Its totient is φ = 77030661256.

The previous prime is 77970059621. The next prime is 77970059701. The reversal of 77970059647 is 74695007977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74695007977 = 151 ⋅494668927.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77970059647 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 (77970059047) 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, 469699072 + ... + 469699237.

It is an arithmetic number, because the mean of its divisors is an integer number (19727364510).

Almost surely, 2^77970059647 is an apocalyptic number.

77970059647 is a deficient number, since it is larger than the sum of its proper divisors (939398393).

77970059647 is an equidigital number, since it uses as much as digits as its factorization.

77970059647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939398392.

The product of its (nonzero) digits is 23337720, while the sum is 61.

The spelling of 77970059647 in words is "seventy-seven billion, nine hundred seventy million, fifty-nine thousand, six hundred forty-seven".