15715856623 has 2 divisors, whose sum is σ = 15715856624. Its totient is φ = 15715856622.

The previous prime is 15715856621. The next prime is 15715856647. The reversal of 15715856623 is 32665851751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15715856623 - 2¹ = 15715856621 is a prime.

Together with 15715856621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15715856621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857928311 + 7857928312.

It is an arithmetic number, because the mean of its divisors is an integer number (7857928312).

Almost surely, 2^15715856623 is an apocalyptic number.

15715856623 is a deficient number, since it is larger than the sum of its proper divisors (1).

15715856623 is an equidigital number, since it uses as much as digits as its factorization.

15715856623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512000, while the sum is 49.

The spelling of 15715856623 in words is "fifteen billion, seven hundred fifteen million, eight hundred fifty-six thousand, six hundred twenty-three".