15715857142873 has 2 divisors, whose sum is σ = 15715857142874. Its totient is φ = 15715857142872.

The previous prime is 15715857142859. The next prime is 15715857142883. The reversal of 15715857142873 is 37824175851751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12724437839689 + 2991419303184 = 3567133^2 + 1729572^2 .

It is a cyclic number.

It is not a de Polignac number, because 15715857142873 - 2²⁵ = 15715823588441 is a prime.

It is not a weakly prime, because it can be changed into another prime (15715857142883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857928571436 + 7857928571437.

It is an arithmetic number, because the mean of its divisors is an integer number (7857928571437).

Almost surely, 2^{15715857142873} is an apocalyptic number.

It is an amenable number.

15715857142873 is a deficient number, since it is larger than the sum of its proper divisors (1).

15715857142873 is an equidigital number, since it uses as much as digits as its factorization.

15715857142873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856000, while the sum is 64.

It can be divided in two parts, 157158571 and 42873, that added together give a square (157201444 = 12538²).

The spelling of 15715857142873 in words is "fifteen trillion, seven hundred fifteen billion, eight hundred fifty-seven million, one hundred forty-two thousand, eight hundred seventy-three".