1361640734945 has 16 divisors (see below), whose sum is σ = 1645109464320. Its totient is φ = 1081896298944.

The previous prime is 1361640734869. The next prime is 1361640734969. The reversal of 1361640734945 is 5494370461631.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361640734945 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, 340676 + ... + 1685034.

It is an arithmetic number, because the mean of its divisors is an integer number (102819341520).

Almost surely, 2^{1361640734945} is an apocalyptic number.

It is an amenable number.

1361640734945 is a deficient number, since it is larger than the sum of its proper divisors (283468729375).

1361640734945 is a wasteful number, since it uses less digits than its factorization.

1361640734945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345744.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 1361640734945 in words is "one trillion, three hundred sixty-one billion, six hundred forty million, seven hundred thirty-four thousand, nine hundred forty-five".