1296625810081 has 16 divisors (see below), whose sum is σ = 1546857621760. Its totient is φ = 1063628729280.

The previous prime is 1296625810079. The next prime is 1296625810087. The reversal of 1296625810081 is 1800185266921.

It is a cyclic number.

It is not a de Polignac number, because 1296625810081 - 2¹ = 1296625810079 is a prime.

It is a super-2 number, since 2×1296625810081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296625810087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41019261 + ... + 41050858.

It is an arithmetic number, because the mean of its divisors is an integer number (96678601360).

Almost surely, 2^{1296625810081} is an apocalyptic number.

It is an amenable number.

1296625810081 is a deficient number, since it is larger than the sum of its proper divisors (250231811679).

1296625810081 is an equidigital number, since it uses as much as digits as its factorization.

1296625810081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82070224.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 1296625810081 in words is "one trillion, two hundred ninety-six billion, six hundred twenty-five million, eight hundred ten thousand, eighty-one".