15917951279 has 2 divisors, whose sum is σ = 15917951280. Its totient is φ = 15917951278.

The previous prime is 15917951261. The next prime is 15917951293. The reversal of 15917951279 is 97215971951.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15917951279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15917951219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7958975639 + 7958975640.

It is an arithmetic number, because the mean of its divisors is an integer number (7958975640).

Almost surely, 2^15917951279 is an apocalyptic number.

15917951279 is a deficient number, since it is larger than the sum of its proper divisors (1).

15917951279 is an equidigital number, since it uses as much as digits as its factorization.

15917951279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1786050, while the sum is 56.

The spelling of 15917951279 in words is "fifteen billion, nine hundred seventeen million, nine hundred fifty-one thousand, two hundred seventy-nine".