81877331939675 has 6 divisors (see below), whose sum is σ = 101527891605228. Its totient is φ = 65501865551720.

The previous prime is 81877331939659. The next prime is 81877331939693. The reversal of 81877331939675 is 57693913377818.

It is not a de Polignac number, because 81877331939675 - 2⁴ = 81877331939659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81877331939596 and 81877331939605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1637546638769 + ... + 1637546638818.

It is an arithmetic number, because the mean of its divisors is an integer number (16921315267538).

Almost surely, 2^{81877331939675} is an apocalyptic number.

81877331939675 is a deficient number, since it is larger than the sum of its proper divisors (19650559665553).

81877331939675 is a wasteful number, since it uses less digits than its factorization.

81877331939675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3275093277597 (or 3275093277592 counting only the distinct ones).

The product of its digits is 1440270720, while the sum is 77.

The spelling of 81877331939675 in words is "eighty-one trillion, eight hundred seventy-seven billion, three hundred thirty-one million, nine hundred thirty-nine thousand, six hundred seventy-five".