1865065945072 has 40 divisors (see below), whose sum is σ = 3949073314560. Its totient is φ = 846251417280.

The previous prime is 1865065945021. The next prime is 1865065945079. The reversal of 1865065945072 is 2705495605681.

It is a happy number.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1865065944998 and 1865065945016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1865065945079) 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, 9312072 + ... + 9510247.

It is an arithmetic number, because the mean of its divisors is an integer number (98726832864).

Almost surely, 2^{1865065945072} is an apocalyptic number.

It is an amenable number.

1865065945072 is an abundant number, since it is smaller than the sum of its proper divisors (2084007369488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1865065945072 is a wasteful number, since it uses less digits than its factorization.

1865065945072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18822901 (or 18822895 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 58.

The spelling of 1865065945072 in words is "one trillion, eight hundred sixty-five billion, sixty-five million, nine hundred forty-five thousand, seventy-two".