79090256149 has 2 divisors, whose sum is σ = 79090256150. Its totient is φ = 79090256148.

The previous prime is 79090256131. The next prime is 79090256209. The reversal of 79090256149 is 94165209097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75560113924 + 3530142225 = 274882^2 + 59415^2 .

It is a cyclic number.

It is not a de Polignac number, because 79090256149 - 2²¹ = 79088158997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79090256096 and 79090256105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79090256249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39545128074 + 39545128075.

It is an arithmetic number, because the mean of its divisors is an integer number (39545128075).

Almost surely, 2^79090256149 is an apocalyptic number.

It is an amenable number.

79090256149 is a deficient number, since it is larger than the sum of its proper divisors (1).

79090256149 is an equidigital number, since it uses as much as digits as its factorization.

79090256149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 79090256149 in words is "seventy-nine billion, ninety million, two hundred fifty-six thousand, one hundred forty-nine".