77928910159 has 2 divisors, whose sum is σ = 77928910160. Its totient is φ = 77928910158.

The previous prime is 77928910133. The next prime is 77928910217. The reversal of 77928910159 is 95101982977.

It is an a-pointer prime, because the next prime (77928910217) can be obtained adding 77928910159 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77928910159 - 2⁵ = 77928910127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77928914159) 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 as a sum of consecutive naturals, namely, 38964455079 + 38964455080.

It is an arithmetic number, because the mean of its divisors is an integer number (38964455080).

Almost surely, 2^77928910159 is an apocalyptic number.

77928910159 is a deficient number, since it is larger than the sum of its proper divisors (1).

77928910159 is an equidigital number, since it uses as much as digits as its factorization.

77928910159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 58.

The spelling of 77928910159 in words is "seventy-seven billion, nine hundred twenty-eight million, nine hundred ten thousand, one hundred fifty-nine".