15761516081 has 2 divisors, whose sum is σ = 15761516082. Its totient is φ = 15761516080.

The previous prime is 15761516047. The next prime is 15761516083. The reversal of 15761516081 is 18061516751.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10565989681 + 5195526400 = 102791^2 + 72080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15761516081 is a prime.

It is a super-2 number, since 2×15761516081² (a number of 21 digits) contains 22 as substring.

Together with 15761516083, 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 (15761516083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7880758040 + 7880758041.

It is an arithmetic number, because the mean of its divisors is an integer number (7880758041).

Almost surely, 2^15761516081 is an apocalyptic number.

It is an amenable number.

15761516081 is a deficient number, since it is larger than the sum of its proper divisors (1).

15761516081 is an equidigital number, since it uses as much as digits as its factorization.

15761516081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 41.

The spelling of 15761516081 in words is "fifteen billion, seven hundred sixty-one million, five hundred sixteen thousand, eighty-one".