2015863142989 has 2 divisors, whose sum is σ = 2015863142990. Its totient is φ = 2015863142988.

The previous prime is 2015863142903. The next prime is 2015863143029. The reversal of 2015863142989 is 9892413685102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1805911320964 + 209951822025 = 1343842^2 + 458205^2 .

It is a cyclic number.

It is not a de Polignac number, because 2015863142989 - 2⁹ = 2015863142477 is a prime.

It is a super-2 number, since 2×2015863142989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2015863148989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007931571494 + 1007931571495.

It is an arithmetic number, because the mean of its divisors is an integer number (1007931571495).

Almost surely, 2^{2015863142989} is an apocalyptic number.

It is an amenable number.

2015863142989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015863142989 is an equidigital number, since it uses as much as digits as its factorization.

2015863142989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 2015863142989 in words is "two trillion, fifteen billion, eight hundred sixty-three million, one hundred forty-two thousand, nine hundred eighty-nine".