81154876 has 24 divisors (see below), whose sum is σ = 160277040. Its totient is φ = 35616000.

The previous prime is 81154859. The next prime is 81154897. The reversal of 81154876 is 67845118.

81154876 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×81154876² = 13172227797150752, which contains 22 as substring.

81154876 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30525 + ... + 33076.

It is an arithmetic number, because the mean of its divisors is an integer number (6678210).

Almost surely, 2^81154876 is an apocalyptic number.

It is an amenable number.

81154876 is a deficient number, since it is larger than the sum of its proper divisors (79122164).

81154876 is a wasteful number, since it uses less digits than its factorization.

81154876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63645 (or 63643 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 81154876 is about 9008.6001132251. The cubic root of 81154876 is about 432.9504607598.

The spelling of 81154876 in words is "eighty-one million, one hundred fifty-four thousand, eight hundred seventy-six".