15704157823 has 2 divisors, whose sum is σ = 15704157824. Its totient is φ = 15704157822.

The previous prime is 15704157817. The next prime is 15704157869. The reversal of 15704157823 is 32875140751.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15704157823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15704157823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15704157883) 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, 7852078911 + 7852078912.

It is an arithmetic number, because the mean of its divisors is an integer number (7852078912).

Almost surely, 2^15704157823 is an apocalyptic number.

15704157823 is a deficient number, since it is larger than the sum of its proper divisors (1).

15704157823 is an equidigital number, since it uses as much as digits as its factorization.

15704157823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 15704157823 in words is "fifteen billion, seven hundred four million, one hundred fifty-seven thousand, eight hundred twenty-three".