15642825827 has 2 divisors, whose sum is σ = 15642825828. Its totient is φ = 15642825826.

The previous prime is 15642825769. The next prime is 15642825833. The reversal of 15642825827 is 72852824651.

It is a strong prime.

It is an emirp because it is prime and its reverse (72852824651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15642825827 - 2¹² = 15642821731 is a prime.

It is not a weakly prime, because it can be changed into another prime (15642825857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7821412913 + 7821412914.

It is an arithmetic number, because the mean of its divisors is an integer number (7821412914).

Almost surely, 2^15642825827 is an apocalyptic number.

15642825827 is a deficient number, since it is larger than the sum of its proper divisors (1).

15642825827 is an equidigital number, since it uses as much as digits as its factorization.

15642825827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2150400, while the sum is 50.

The spelling of 15642825827 in words is "fifteen billion, six hundred forty-two million, eight hundred twenty-five thousand, eight hundred twenty-seven".