15081197279 has 2 divisors, whose sum is σ = 15081197280. Its totient is φ = 15081197278.

The previous prime is 15081197251. The next prime is 15081197387. The reversal of 15081197279 is 97279118051.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15081197279 - 2²⁸ = 14812761823 is a prime.

It is a super-2 number, since 2×15081197279² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15081797279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7540598639 + 7540598640.

It is an arithmetic number, because the mean of its divisors is an integer number (7540598640).

Almost surely, 2^15081197279 is an apocalyptic number.

15081197279 is a deficient number, since it is larger than the sum of its proper divisors (1).

15081197279 is an equidigital number, since it uses as much as digits as its factorization.

15081197279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 50.

The spelling of 15081197279 in words is "fifteen billion, eighty-one million, one hundred ninety-seven thousand, two hundred seventy-nine".