1365864685641 has 6 divisors (see below), whose sum is σ = 1972915657050. Its totient is φ = 910576457088.

The previous prime is 1365864685613. The next prime is 1365864685657. The reversal of 1365864685641 is 1465864685631.

It is a happy number.

1365864685641 is a `hidden beast` number, since 1 + 3 + 6 + 5 + 8 + 6 + 4 + 68 + 564 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1316019658041 + 49845027600 = 1147179^2 + 223260^2 .

It is not a de Polignac number, because 1365864685641 - 2⁵ = 1365864685609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1365864685441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75881371416 + ... + 75881371433.

It is an arithmetic number, because the mean of its divisors is an integer number (328819276175).

Almost surely, 2^{1365864685641} is an apocalyptic number.

It is an amenable number.

1365864685641 is a deficient number, since it is larger than the sum of its proper divisors (607050971409).

1365864685641 is a wasteful number, since it uses less digits than its factorization.

1365864685641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151762742855 (or 151762742852 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 63.

The spelling of 1365864685641 in words is "one trillion, three hundred sixty-five billion, eight hundred sixty-four million, six hundred eighty-five thousand, six hundred forty-one".