15361997907779 has 2 divisors, whose sum is σ = 15361997907780. Its totient is φ = 15361997907778.

The previous prime is 15361997907743. The next prime is 15361997907793. The reversal of 15361997907779 is 97770979916351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15361997907779 - 2³² = 15357702940483 is a prime.

It is not a weakly prime, because it can be changed into another prime (15361997907379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7680998953889 + 7680998953890.

It is an arithmetic number, because the mean of its divisors is an integer number (7680998953890).

Almost surely, 2^{15361997907779} is an apocalyptic number.

15361997907779 is a deficient number, since it is larger than the sum of its proper divisors (1).

15361997907779 is an equidigital number, since it uses as much as digits as its factorization.

15361997907779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1417766490, while the sum is 80.

The spelling of 15361997907779 in words is "fifteen trillion, three hundred sixty-one billion, nine hundred ninety-seven million, nine hundred seven thousand, seven hundred seventy-nine".