15278282779 has 2 divisors, whose sum is σ = 15278282780. Its totient is φ = 15278282778.

The previous prime is 15278282731. The next prime is 15278282797. The reversal of 15278282779 is 97728287251.

Together with next prime (15278282797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15278282779 - 2⁹ = 15278282267 is a prime.

It is not a weakly prime, because it can be changed into another prime (15278282879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7639141389 + 7639141390.

It is an arithmetic number, because the mean of its divisors is an integer number (7639141390).

Almost surely, 2^15278282779 is an apocalyptic number.

15278282779 is a deficient number, since it is larger than the sum of its proper divisors (1).

15278282779 is an equidigital number, since it uses as much as digits as its factorization.

15278282779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7902720, while the sum is 58.

The spelling of 15278282779 in words is "fifteen billion, two hundred seventy-eight million, two hundred eighty-two thousand, seven hundred seventy-nine".