15969724541 has 2 divisors, whose sum is σ = 15969724542. Its totient is φ = 15969724540.

The previous prime is 15969724489. The next prime is 15969724597. The reversal of 15969724541 is 14542796951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15874740025 + 94984516 = 125995^2 + 9746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15969724541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15969724241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7984862270 + 7984862271.

It is an arithmetic number, because the mean of its divisors is an integer number (7984862271).

Almost surely, 2^15969724541 is an apocalyptic number.

It is an amenable number.

15969724541 is a deficient number, since it is larger than the sum of its proper divisors (1).

15969724541 is an equidigital number, since it uses as much as digits as its factorization.

15969724541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 53.

The spelling of 15969724541 in words is "fifteen billion, nine hundred sixty-nine million, seven hundred twenty-four thousand, five hundred forty-one".