1361551512243 has 8 divisors (see below), whose sum is σ = 1955048325328. Its totient is φ = 837877853664.

The previous prime is 1361551512227. The next prime is 1361551512247. The reversal of 1361551512243 is 3422151551631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1361551512243 - 2⁴ = 1361551512227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 34911577237 = 1361551512243 / (1 + 3 + 6 + 1 + 5 + 5 + 1 + 5 + 1 + 2 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361551512247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17455788580 + ... + 17455788657.

It is an arithmetic number, because the mean of its divisors is an integer number (244381040666).

Almost surely, 2^{1361551512243} is an apocalyptic number.

1361551512243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1361551512243 is a deficient number, since it is larger than the sum of its proper divisors (593496813085).

1361551512243 is a wasteful number, since it uses less digits than its factorization.

1361551512243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34911577253.

The product of its digits is 108000, while the sum is 39.

The spelling of 1361551512243 in words is "one trillion, three hundred sixty-one billion, five hundred fifty-one million, five hundred twelve thousand, two hundred forty-three".