83187906418 has 16 divisors (see below), whose sum is σ = 125972910360. Its totient is φ = 41197216896.

The previous prime is 83187906391. The next prime is 83187906457. The reversal of 83187906418 is 81460978138.

It can be written as a sum of positive squares in 4 ways, for example, as 65118363489 + 18069542929 = 255183^2 + 134423^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536680 + ... + 674092.

Almost surely, 2^83187906418 is an apocalyptic number.

83187906418 is a deficient number, since it is larger than the sum of its proper divisors (42785003942).

83187906418 is a wasteful number, since it uses less digits than its factorization.

83187906418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140301.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 83187906418 in words is "eighty-three billion, one hundred eighty-seven million, nine hundred six thousand, four hundred eighteen".