81454876 has 6 divisors (see below), whose sum is σ = 142546040. Its totient is φ = 40727436.

The previous prime is 81454861. The next prime is 81454889. The reversal of 81454876 is 67845418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181856 + ... + 10181863.

Almost surely, 2^81454876 is an apocalyptic number.

It is an amenable number.

81454876 is a deficient number, since it is larger than the sum of its proper divisors (61091164).

81454876 is a wasteful number, since it uses less digits than its factorization.

81454876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20363723 (or 20363721 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 81454876 is about 9025.2355093925. The cubic root of 81454876 is about 433.4832914267.

The spelling of 81454876 in words is "eighty-one million, four hundred fifty-four thousand, eight hundred seventy-six".