79459604977 has 2 divisors, whose sum is σ = 79459604978. Its totient is φ = 79459604976.

The previous prime is 79459604969. The next prime is 79459604989. The reversal of 79459604977 is 77940695497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76419626481 + 3039978496 = 276441^2 + 55136^2 .

It is a cyclic number.

It is not a de Polignac number, because 79459604977 - 2³ = 79459604969 is a prime.

It is not a weakly prime, because it can be changed into another prime (79459604677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39729802488 + 39729802489.

It is an arithmetic number, because the mean of its divisors is an integer number (39729802489).

Almost surely, 2^79459604977 is an apocalyptic number.

It is an amenable number.

79459604977 is a deficient number, since it is larger than the sum of its proper divisors (1).

79459604977 is an equidigital number, since it uses as much as digits as its factorization.

79459604977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120022560, while the sum is 67.

The spelling of 79459604977 in words is "seventy-nine billion, four hundred fifty-nine million, six hundred four thousand, nine hundred seventy-seven".