83778195185 has 4 divisors (see below), whose sum is σ = 100533834228. Its totient is φ = 67022556144.

The previous prime is 83778195161. The next prime is 83778195197. The reversal of 83778195185 is 58159187738.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60921593329 + 22856601856 = 246823^2 + 151184^2 .

It is a cyclic number.

It is not a de Polignac number, because 83778195185 - 2⁶ = 83778195121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8377819514 + ... + 8377819523.

It is an arithmetic number, because the mean of its divisors is an integer number (25133458557).

Almost surely, 2^83778195185 is an apocalyptic number.

It is an amenable number.

83778195185 is a deficient number, since it is larger than the sum of its proper divisors (16755639043).

83778195185 is a wasteful number, since it uses less digits than its factorization.

83778195185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16755639042.

The product of its digits is 16934400, while the sum is 62.

The spelling of 83778195185 in words is "eighty-three billion, seven hundred seventy-eight million, one hundred ninety-five thousand, one hundred eighty-five".