81266792 has 16 divisors (see below), whose sum is σ = 153576960. Its totient is φ = 40312944.

The previous prime is 81266761. The next prime is 81266827. The reversal of 81266792 is 29766218.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38978 + ... + 41009.

It is an arithmetic number, because the mean of its divisors is an integer number (9598560).

Almost surely, 2^81266792 is an apocalyptic number.

It is an amenable number.

81266792 is a deficient number, since it is larger than the sum of its proper divisors (72310168).

81266792 is a wasteful number, since it uses less digits than its factorization.

81266792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80120 (or 80116 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 81266792 is about 9014.8095931084. The cubic root of 81266792 is about 433.1493883322.

The spelling of 81266792 in words is "eighty-one million, two hundred sixty-six thousand, seven hundred ninety-two".