81276832953 has 18 divisors (see below), whose sum is σ = 119178318714. Its totient is φ = 53375804064.

The previous prime is 81276832943. The next prime is 81276832961. The reversal of 81276832953 is 35923867218.

81276832953 is a `hidden beast` number, since 8 + 1 + 276 + 83 + 295 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43028034624 + 38248798329 = 207432^2 + 195573^2 .

It is not a de Polignac number, because 81276832953 - 2⁸ = 81276832697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81276832953.

It is not an unprimeable number, because it can be changed into a prime (81276832913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 965476 + ... + 1046277.

Almost surely, 2^81276832953 is an apocalyptic number.

It is an amenable number.

81276832953 is a deficient number, since it is larger than the sum of its proper divisors (37901485761).

81276832953 is a wasteful number, since it uses less digits than its factorization.

81276832953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011893 (or 2011823 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 81276832953 in words is "eighty-one billion, two hundred seventy-six million, eight hundred thirty-two thousand, nine hundred fifty-three".