83418925805 has 4 divisors (see below), whose sum is σ = 100102710972. Its totient is φ = 66735140640.

The previous prime is 83418925781. The next prime is 83418925819. The reversal of 83418925805 is 50852981438.

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 12928144804 + 70490781001 = 113702^2 + 265501^2 .

It is not a de Polignac number, because 83418925805 - 2⁸ = 83418925549 is a prime.

It is a Duffinian number.

It is a congruent 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, 8341892576 + ... + 8341892585.

It is an arithmetic number, because the mean of its divisors is an integer number (25025677743).

Almost surely, 2^83418925805 is an apocalyptic number.

It is an amenable number.

83418925805 is a deficient number, since it is larger than the sum of its proper divisors (16683785167).

83418925805 is a wasteful number, since it uses less digits than its factorization.

83418925805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16683785166.

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 83418925805 in words is "eighty-three billion, four hundred eighteen million, nine hundred twenty-five thousand, eight hundred five".