1311255645630 has 64 divisors (see below), whose sum is σ = 3673110067200. Its totient is φ = 293338646784.

The previous prime is 1311255645619. The next prime is 1311255645631. The reversal of 1311255645630 is 365465521131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311255645631) 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 31 ways as a sum of consecutive naturals, for example, 66416455 + ... + 66436194.

It is an arithmetic number, because the mean of its divisors is an integer number (57392344800).

Almost surely, 2^{1311255645630} is an apocalyptic number.

1311255645630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311255645630 is an abundant number, since it is smaller than the sum of its proper divisors (2361854421570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311255645630 is a wasteful number, since it uses less digits than its factorization.

1311255645630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132852713.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 1311255645630 in words is "one trillion, three hundred eleven billion, two hundred fifty-five million, six hundred forty-five thousand, six hundred thirty".