1865996165398 has 8 divisors (see below), whose sum is σ = 2810608332840. Its totient is φ = 929126721120.

The previous prime is 1865996165377. The next prime is 1865996165401. The reversal of 1865996165398 is 8935616995681.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935680188 + ... + 1935681151.

It is an arithmetic number, because the mean of its divisors is an integer number (351326041605).

Almost surely, 2^{1865996165398} is an apocalyptic number.

1865996165398 is a deficient number, since it is larger than the sum of its proper divisors (944612167442).

1865996165398 is a wasteful number, since it uses less digits than its factorization.

1865996165398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871361582.

The product of its digits is 755827200, while the sum is 76.

The spelling of 1865996165398 in words is "one trillion, eight hundred sixty-five billion, nine hundred ninety-six million, one hundred sixty-five thousand, three hundred ninety-eight".