1311620461355 has 4 divisors (see below), whose sum is σ = 1573944553632. Its totient is φ = 1049296369080.

The previous prime is 1311620461351. The next prime is 1311620461357. The reversal of 1311620461355 is 5531640261131.

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

It is not a de Polignac number, because 1311620461355 - 2² = 1311620461351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311620461351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131162046131 + ... + 131162046140.

It is an arithmetic number, because the mean of its divisors is an integer number (393486138408).

Almost surely, 2^{1311620461355} is an apocalyptic number.

1311620461355 is a deficient number, since it is larger than the sum of its proper divisors (262324092277).

1311620461355 is an equidigital number, since it uses as much as digits as its factorization.

1311620461355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262324092276.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 1311620461355 in words is "one trillion, three hundred eleven billion, six hundred twenty million, four hundred sixty-one thousand, three hundred fifty-five".