1311630441655 has 4 divisors (see below), whose sum is σ = 1573956529992. Its totient is φ = 1049304353320.

The previous prime is 1311630441647. The next prime is 1311630441701. The reversal of 1311630441655 is 5561440361131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1311630441655 - 2³ = 1311630441647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131163044161 + ... + 131163044170.

It is an arithmetic number, because the mean of its divisors is an integer number (393489132498).

Almost surely, 2^{1311630441655} is an apocalyptic number.

1311630441655 is a deficient number, since it is larger than the sum of its proper divisors (262326088337).

1311630441655 is an equidigital number, since it uses as much as digits as its factorization.

1311630441655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262326088336.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 1311630441655 in words is "one trillion, three hundred eleven billion, six hundred thirty million, four hundred forty-one thousand, six hundred fifty-five".