15642138263 has 2 divisors, whose sum is σ = 15642138264. Its totient is φ = 15642138262.

The previous prime is 15642138257. The next prime is 15642138269. The reversal of 15642138263 is 36283124651.

It is a balanced prime because it is at equal distance from previous prime (15642138257) and next prime (15642138269).

It is an emirp because it is prime and its reverse (36283124651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15642138263 - 2¹⁶ = 15642072727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15642138263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15642138269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7821069131 + 7821069132.

It is an arithmetic number, because the mean of its divisors is an integer number (7821069132).

Almost surely, 2^15642138263 is an apocalyptic number.

15642138263 is a deficient number, since it is larger than the sum of its proper divisors (1).

15642138263 is an equidigital number, since it uses as much as digits as its factorization.

15642138263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 41.

The spelling of 15642138263 in words is "fifteen billion, six hundred forty-two million, one hundred thirty-eight thousand, two hundred sixty-three".