81774796 has 24 divisors (see below), whose sum is σ = 145635840. Its totient is φ = 40170000.

The previous prime is 81774793. The next prime is 81774799. The reversal of 81774796 is 69747718.

It is an interprime number because it is at equal distance from previous prime (81774793) and next prime (81774799).

It is not an unprimeable number, because it can be changed into a prime (81774793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78801 + ... + 79831.

It is an arithmetic number, because the mean of its divisors is an integer number (6068160).

Almost surely, 2^81774796 is an apocalyptic number.

It is an amenable number.

81774796 is a deficient number, since it is larger than the sum of its proper divisors (63861044).

81774796 is a wasteful number, since it uses less digits than its factorization.

81774796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365 (or 1363 counting only the distinct ones).

The product of its digits is 592704, while the sum is 49.

The square root of 81774796 is about 9042.9417779835. The cubic root of 81774796 is about 434.0500625354.

The spelling of 81774796 in words is "eighty-one million, seven hundred seventy-four thousand, seven hundred ninety-six".