81332026863 has 16 divisors (see below), whose sum is σ = 113353771776. Its totient is φ = 51773990400.

The previous prime is 81332026859. The next prime is 81332026871. The reversal of 81332026863 is 36862023318.

It is a happy number.

It is not a de Polignac number, because 81332026863 - 2² = 81332026859 is a prime.

It is a super-2 number, since 2×81332026863² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81332026813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 981613 + ... + 1061238.

It is an arithmetic number, because the mean of its divisors is an integer number (7084610736).

Almost surely, 2^81332026863 is an apocalyptic number.

81332026863 is a deficient number, since it is larger than the sum of its proper divisors (32021744913).

81332026863 is a wasteful number, since it uses less digits than its factorization.

81332026863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043454.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 81332026863 in words is "eighty-one billion, three hundred thirty-two million, twenty-six thousand, eight hundred sixty-three".