15690561193 has 2 divisors, whose sum is σ = 15690561194. Its totient is φ = 15690561192.

The previous prime is 15690561181. The next prime is 15690561197. The reversal of 15690561193 is 39116509651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15603007744 + 87553449 = 124912^2 + 9357^2 .

It is a cyclic number.

It is not a de Polignac number, because 15690561193 - 2¹⁷ = 15690430121 is a prime.

It is not a weakly prime, because it can be changed into another prime (15690561197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7845280596 + 7845280597.

It is an arithmetic number, because the mean of its divisors is an integer number (7845280597).

Almost surely, 2^15690561193 is an apocalyptic number.

It is an amenable number.

15690561193 is a deficient number, since it is larger than the sum of its proper divisors (1).

15690561193 is an equidigital number, since it uses as much as digits as its factorization.

15690561193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 218700, while the sum is 46.

The spelling of 15690561193 in words is "fifteen billion, six hundred ninety million, five hundred sixty-one thousand, one hundred ninety-three".