81883256159 has 8 divisors (see below), whose sum is σ = 91263072240. Its totient is φ = 73010457216.

The previous prime is 81883256123. The next prime is 81883256183. The reversal of 81883256159 is 95165238818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81883256159 is a prime.

It is a super-2 number, since 2×81883256159² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81883250159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126753944 + ... + 126754589.

It is an arithmetic number, because the mean of its divisors is an integer number (11407884030).

Almost surely, 2^81883256159 is an apocalyptic number.

81883256159 is a deficient number, since it is larger than the sum of its proper divisors (9379816081).

81883256159 is a wasteful number, since it uses less digits than its factorization.

81883256159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253508569.

The product of its digits is 4147200, while the sum is 56.

The spelling of 81883256159 in words is "eighty-one billion, eight hundred eighty-three million, two hundred fifty-six thousand, one hundred fifty-nine".