1261314618811 has 8 divisors (see below), whose sum is σ = 1358356652240. Its totient is φ = 1164275132832.

The previous prime is 1261314618799. The next prime is 1261314618827. The reversal of 1261314618811 is 1188164131621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1261314618811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261314610811) 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 7 ways as a sum of consecutive naturals, for example, 461680 + ... + 1654018.

It is an arithmetic number, because the mean of its divisors is an integer number (169794581530).

Almost surely, 2^{1261314618811} is an apocalyptic number.

1261314618811 is a deficient number, since it is larger than the sum of its proper divisors (97042033429).

1261314618811 is a wasteful number, since it uses less digits than its factorization.

1261314618811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273725.

The product of its digits is 55296, while the sum is 43.

The spelling of 1261314618811 in words is "one trillion, two hundred sixty-one billion, three hundred fourteen million, six hundred eighteen thousand, eight hundred eleven".