1361043643145 has 16 divisors (see below), whose sum is σ = 1729507731840. Its totient is φ = 1025350988544.

The previous prime is 1361043643139. The next prime is 1361043643177. The reversal of 1361043643145 is 5413463401631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361043643145 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42878672 + ... + 42910401.

It is an arithmetic number, because the mean of its divisors is an integer number (108094233240).

Almost surely, 2^{1361043643145} is an apocalyptic number.

It is an amenable number.

1361043643145 is a deficient number, since it is larger than the sum of its proper divisors (368464088695).

1361043643145 is a wasteful number, since it uses less digits than its factorization.

1361043643145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85789264.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 1361043643145 in words is "one trillion, three hundred sixty-one billion, forty-three million, six hundred forty-three thousand, one hundred forty-five".