15611560493 has 2 divisors, whose sum is σ = 15611560494. Its totient is φ = 15611560492.

The previous prime is 15611560483. The next prime is 15611560499. The reversal of 15611560493 is 39406511651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15084261124 + 527299369 = 122818^2 + 22963^2 .

It is a cyclic number.

It is not a de Polignac number, because 15611560493 - 2⁶ = 15611560429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15611560493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15611560499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7805780246 + 7805780247.

It is an arithmetic number, because the mean of its divisors is an integer number (7805780247).

Almost surely, 2^15611560493 is an apocalyptic number.

It is an amenable number.

15611560493 is a deficient number, since it is larger than the sum of its proper divisors (1).

15611560493 is an equidigital number, since it uses as much as digits as its factorization.

15611560493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 15611560493 in words is "fifteen billion, six hundred eleven million, five hundred sixty thousand, four hundred ninety-three".