15871572872873 has 2 divisors, whose sum is σ = 15871572872874. Its totient is φ = 15871572872872.

The previous prime is 15871572872843. The next prime is 15871572872893. The reversal of 15871572872873 is 37827827517851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13121405033104 + 2750167839769 = 3622348^2 + 1658363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15871572872873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15871572872797 and 15871572872806.

It is not a weakly prime, because it can be changed into another prime (15871572872843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7935786436436 + 7935786436437.

It is an arithmetic number, because the mean of its divisors is an integer number (7935786436437).

Almost surely, 2^{15871572872873} is an apocalyptic number.

It is an amenable number.

15871572872873 is a deficient number, since it is larger than the sum of its proper divisors (1).

15871572872873 is an equidigital number, since it uses as much as digits as its factorization.

15871572872873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 368793600, while the sum is 71.

The spelling of 15871572872873 in words is "fifteen trillion, eight hundred seventy-one billion, five hundred seventy-two million, eight hundred seventy-two thousand, eight hundred seventy-three".