15261827081 has 16 divisors (see below), whose sum is σ = 15915968640. Its totient is φ = 14620959360.

The previous prime is 15261827041. The next prime is 15261827117. The reversal of 15261827081 is 18072816251.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15261827081 is a prime.

It is a super-2 number, since 2×15261827081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15261827011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2247950 + ... + 2254728.

It is an arithmetic number, because the mean of its divisors is an integer number (994748040).

Almost surely, 2^15261827081 is an apocalyptic number.

It is an amenable number.

15261827081 is a deficient number, since it is larger than the sum of its proper divisors (654141559).

15261827081 is an equidigital number, since it uses as much as digits as its factorization.

15261827081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7744.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 15261827081 in words is "fifteen billion, two hundred sixty-one million, eight hundred twenty-seven thousand, eighty-one".