1311626535645 has 32 divisors (see below), whose sum is σ = 2125176998400. Its totient is φ = 690698156544.

The previous prime is 1311626535631. The next prime is 1311626535647. The reversal of 1311626535645 is 5465356261131.

It is not a de Polignac number, because 1311626535645 - 2⁵ = 1311626535613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311626535594 and 1311626535603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311626535647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253644 + ... + 1639386.

It is an arithmetic number, because the mean of its divisors is an integer number (66411781200).

Almost surely, 2^{1311626535645} is an apocalyptic number.

1311626535645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311626535645 is a deficient number, since it is larger than the sum of its proper divisors (813550462755).

1311626535645 is a wasteful number, since it uses less digits than its factorization.

1311626535645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386549.

The product of its digits is 1944000, while the sum is 48.

The spelling of 1311626535645 in words is "one trillion, three hundred eleven billion, six hundred twenty-six million, five hundred thirty-five thousand, six hundred forty-five".