15278768971 has 2 divisors, whose sum is σ = 15278768972. Its totient is φ = 15278768970.

The previous prime is 15278768873. The next prime is 15278768983. The reversal of 15278768971 is 17986787251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15278768971 - 2⁹ = 15278768459 is a prime.

It is not a weakly prime, because it can be changed into another prime (15278768671) 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, 7639384485 + 7639384486.

It is an arithmetic number, because the mean of its divisors is an integer number (7639384486).

Almost surely, 2^15278768971 is an apocalyptic number.

15278768971 is a deficient number, since it is larger than the sum of its proper divisors (1).

15278768971 is an equidigital number, since it uses as much as digits as its factorization.

15278768971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 61.

The spelling of 15278768971 in words is "fifteen billion, two hundred seventy-eight million, seven hundred sixty-eight thousand, nine hundred seventy-one".