15142865891 has 2 divisors, whose sum is σ = 15142865892. Its totient is φ = 15142865890.

The previous prime is 15142865869. The next prime is 15142865897. The reversal of 15142865891 is 19856824151.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15142865891 is a prime.

It is a super-2 number, since 2×15142865891² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15142865897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7571432945 + 7571432946.

It is an arithmetic number, because the mean of its divisors is an integer number (7571432946).

Almost surely, 2^15142865891 is an apocalyptic number.

15142865891 is a deficient number, since it is larger than the sum of its proper divisors (1).

15142865891 is an equidigital number, since it uses as much as digits as its factorization.

15142865891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691200, while the sum is 50.

The spelling of 15142865891 in words is "fifteen billion, one hundred forty-two million, eight hundred sixty-five thousand, eight hundred ninety-one".