81736376 has 8 divisors (see below), whose sum is σ = 153255720. Its totient is φ = 40868184.

The previous prime is 81736363. The next prime is 81736381. The reversal of 81736376 is 67363718.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×81736376² = 13361670323226752, which contains 22 as substring.

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, 5108516 + ... + 5108531.

It is an arithmetic number, because the mean of its divisors is an integer number (19156965).

Almost surely, 2^81736376 is an apocalyptic number.

It is an amenable number.

81736376 is a deficient number, since it is larger than the sum of its proper divisors (71519344).

81736376 is a wasteful number, since it uses less digits than its factorization.

81736376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217053 (or 10217049 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 81736376 is about 9040.8172196987. The cubic root of 81736376 is about 433.9820757532.

The spelling of 81736376 in words is "eighty-one million, seven hundred thirty-six thousand, three hundred seventy-six".