83405212186 has 4 divisors (see below), whose sum is σ = 125107818282. Its totient is φ = 41702606092.

The previous prime is 83405212181. The next prime is 83405212213. The reversal of 83405212186 is 68121250438.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68121250438 = 2 ⋅34060625219.

It can be written as a sum of positive squares in only one way, i.e., 83402552025 + 2660161 = 288795^2 + 1631^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (83405212181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20851303045 + ... + 20851303048.

Almost surely, 2^83405212186 is an apocalyptic number.

83405212186 is a deficient number, since it is larger than the sum of its proper divisors (41702606096).

83405212186 is a wasteful number, since it uses less digits than its factorization.

83405212186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41702606095.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 83405212186 in words is "eighty-three billion, four hundred five million, two hundred twelve thousand, one hundred eighty-six".