81795648 has 56 divisors (see below), whose sum is σ = 236098080. Its totient is φ = 24785920.

The previous prime is 81795617. The next prime is 81795667. The reversal of 81795648 is 84659718.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 81795597 and 81795606.

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, 17253 + ... + 21476.

Almost surely, 2^81795648 is an apocalyptic number.

81795648 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

81795648 is an abundant number, since it is smaller than the sum of its proper divisors (154302432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81795648 is a wasteful number, since it uses less digits than its factorization.

81795648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38755 (or 38745 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 81795648 is about 9044.0946478904. The cubic root of 81795648 is about 434.0869526415.

The spelling of 81795648 in words is "eighty-one million, seven hundred ninety-five thousand, six hundred forty-eight".