15787130687 has 2 divisors, whose sum is σ = 15787130688. Its totient is φ = 15787130686.

The previous prime is 15787130683. The next prime is 15787130717. The reversal of 15787130687 is 78603178751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15787130687 - 2² = 15787130683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15787130683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7893565343 + 7893565344.

It is an arithmetic number, because the mean of its divisors is an integer number (7893565344).

Almost surely, 2^15787130687 is an apocalyptic number.

15787130687 is a deficient number, since it is larger than the sum of its proper divisors (1).

15787130687 is an equidigital number, since it uses as much as digits as its factorization.

15787130687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1975680, while the sum is 53.

The spelling of 15787130687 in words is "fifteen billion, seven hundred eighty-seven million, one hundred thirty thousand, six hundred eighty-seven".