81101076 has 36 divisors (see below), whose sum is σ = 220133088. Its totient is φ = 23171568.

The previous prime is 81101051. The next prime is 81101113. The reversal of 81101076 is 67010118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68376 + ... + 69551.

It is an arithmetic number, because the mean of its divisors is an integer number (6114808).

Almost surely, 2^81101076 is an apocalyptic number.

It is an amenable number.

81101076 is an abundant number, since it is smaller than the sum of its proper divisors (139032012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81101076 is a wasteful number, since it uses less digits than its factorization.

81101076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137948 (or 137939 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 24.

The square root of 81101076 is about 9005.6135826494. The cubic root of 81101076 is about 432.8547676646.

The spelling of 81101076 in words is "eighty-one million, one hundred one thousand, seventy-six".