15543513497 has 2 divisors, whose sum is σ = 15543513498. Its totient is φ = 15543513496.

The previous prime is 15543513463. The next prime is 15543513499. The reversal of 15543513497 is 79431534551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15361371481 + 182142016 = 123941^2 + 13496^2 .

It is a cyclic number.

It is not a de Polignac number, because 15543513497 - 2⁸ = 15543513241 is a prime.

Together with 15543513499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15543513499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7771756748 + 7771756749.

It is an arithmetic number, because the mean of its divisors is an integer number (7771756749).

Almost surely, 2^15543513497 is an apocalyptic number.

It is an amenable number.

15543513497 is a deficient number, since it is larger than the sum of its proper divisors (1).

15543513497 is an equidigital number, since it uses as much as digits as its factorization.

15543513497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 47.

The spelling of 15543513497 in words is "fifteen billion, five hundred forty-three million, five hundred thirteen thousand, four hundred ninety-seven".