1356216554461 has 4 divisors (see below), whose sum is σ = 1356551509500. Its totient is φ = 1355881599424.

The previous prime is 1356216554449. The next prime is 1356216554479. The reversal of 1356216554461 is 1644556126531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 687272502361 + 668944052100 = 829019^2 + 817890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356216554461 - 2⁹ = 1356216553949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356216554761) 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, 167471446 + ... + 167479543.

It is an arithmetic number, because the mean of its divisors is an integer number (339137877375).

Almost surely, 2^{1356216554461} is an apocalyptic number.

It is an amenable number.

1356216554461 is a deficient number, since it is larger than the sum of its proper divisors (334955039).

1356216554461 is an equidigital number, since it uses as much as digits as its factorization.

1356216554461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334955038.

The product of its digits is 2592000, while the sum is 49.

The spelling of 1356216554461 in words is "one trillion, three hundred fifty-six billion, two hundred sixteen million, five hundred fifty-four thousand, four hundred sixty-one".