1311561120626 has 16 divisors (see below), whose sum is σ = 2074012922880. Its totient is φ = 621123659040.

The previous prime is 1311561120593. The next prime is 1311561120629. The reversal of 1311561120626 is 6260211651131.

It is not an unprimeable number, because it can be changed into a prime (1311561120629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225041891 + ... + 225047718.

It is an arithmetic number, because the mean of its divisors is an integer number (129625807680).

Almost surely, 2^{1311561120626} is an apocalyptic number.

1311561120626 is a deficient number, since it is larger than the sum of its proper divisors (762451802254).

1311561120626 is a wasteful number, since it uses less digits than its factorization.

1311561120626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450089689.

The product of its (nonzero) digits is 12960, while the sum is 35.

Adding to 1311561120626 its reverse (6260211651131), we get a palindrome (7571772771757).

The spelling of 1311561120626 in words is "one trillion, three hundred eleven billion, five hundred sixty-one million, one hundred twenty thousand, six hundred twenty-six".