1276525015091 has 2 divisors, whose sum is σ = 1276525015092. Its totient is φ = 1276525015090.

The previous prime is 1276525015067. The next prime is 1276525015247. The reversal of 1276525015091 is 1905105256721.

It is a weak prime.

It is an emirp because it is prime and its reverse (1905105256721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1276525015091 - 2³⁰ = 1275451273267 is a prime.

It is a super-2 number, since 2×1276525015091² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1276525017091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638262507545 + 638262507546.

It is an arithmetic number, because the mean of its divisors is an integer number (638262507546).

Almost surely, 2^{1276525015091} is an apocalyptic number.

1276525015091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276525015091 is an equidigital number, since it uses as much as digits as its factorization.

1276525015091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 44.

The spelling of 1276525015091 in words is "one trillion, two hundred seventy-six billion, five hundred twenty-five million, fifteen thousand, ninety-one".