15121881263 has 2 divisors, whose sum is σ = 15121881264. Its totient is φ = 15121881262.

The previous prime is 15121881239. The next prime is 15121881311. The reversal of 15121881263 is 36218812151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15121881263 - 2⁶ = 15121881199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15121881163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560940631 + 7560940632.

It is an arithmetic number, because the mean of its divisors is an integer number (7560940632).

Almost surely, 2^15121881263 is an apocalyptic number.

15121881263 is a deficient number, since it is larger than the sum of its proper divisors (1).

15121881263 is an equidigital number, since it uses as much as digits as its factorization.

15121881263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 38.

The spelling of 15121881263 in words is "fifteen billion, one hundred twenty-one million, eight hundred eighty-one thousand, two hundred sixty-three".