15961766263 has 2 divisors, whose sum is σ = 15961766264. Its totient is φ = 15961766262.

The previous prime is 15961766243. The next prime is 15961766267. The reversal of 15961766263 is 36266716951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15961766263 - 2⁵ = 15961766231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15961766263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15961766267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7980883131 + 7980883132.

It is an arithmetic number, because the mean of its divisors is an integer number (7980883132).

Almost surely, 2^15961766263 is an apocalyptic number.

15961766263 is a deficient number, since it is larger than the sum of its proper divisors (1).

15961766263 is an equidigital number, since it uses as much as digits as its factorization.

15961766263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 52.

The spelling of 15961766263 in words is "fifteen billion, nine hundred sixty-one million, seven hundred sixty-six thousand, two hundred sixty-three".