15699894953 has 2 divisors, whose sum is σ = 15699894954. Its totient is φ = 15699894952.

The previous prime is 15699894941. The next prime is 15699895009. The reversal of 15699894953 is 35949899651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12444964249 + 3254930704 = 111557^2 + 57052^2 .

It is an emirp because it is prime and its reverse (35949899651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15699894953 - 2⁴ = 15699894937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15699894853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7849947476 + 7849947477.

It is an arithmetic number, because the mean of its divisors is an integer number (7849947477).

Almost surely, 2^15699894953 is an apocalyptic number.

It is an amenable number.

15699894953 is a deficient number, since it is larger than the sum of its proper divisors (1).

15699894953 is an equidigital number, since it uses as much as digits as its factorization.

15699894953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94478400, while the sum is 68.

The spelling of 15699894953 in words is "fifteen billion, six hundred ninety-nine million, eight hundred ninety-four thousand, nine hundred fifty-three".