83903662081 has 4 divisors (see below), whose sum is σ = 84040536532. Its totient is φ = 83766787632.

The previous prime is 83903662057. The next prime is 83903662097. The reversal of 83903662081 is 18026630938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18026630938 = 2 ⋅9013315469.

It can be written as a sum of positive squares in 2 ways, for example, as 37564641856 + 46339020225 = 193816^2 + 215265^2 .

It is a cyclic number.

It is not a de Polignac number, because 83903662081 - 2¹⁹ = 83903137793 is a prime.

It is a super-2 number, since 2×83903662081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83903662181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68436306 + ... + 68437531.

It is an arithmetic number, because the mean of its divisors is an integer number (21010134133).

Almost surely, 2^83903662081 is an apocalyptic number.

It is an amenable number.

83903662081 is a deficient number, since it is larger than the sum of its proper divisors (136874451).

83903662081 is a wasteful number, since it uses less digits than its factorization.

83903662081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136874450.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 83903662081 in words is "eighty-three billion, nine hundred three million, six hundred sixty-two thousand, eighty-one".