81896754 has 32 divisors (see below), whose sum is σ = 169989120. Its totient is φ = 26272512.

The previous prime is 81896743. The next prime is 81896777. The reversal of 81896754 is 45769818.

It is a super-3 number, since 3×81896754³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74799 + ... + 75885.

It is an arithmetic number, because the mean of its divisors is an integer number (5312160).

Almost surely, 2^81896754 is an apocalyptic number.

81896754 is an abundant number, since it is smaller than the sum of its proper divisors (88092366).

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

81896754 is a wasteful number, since it uses less digits than its factorization.

81896754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554.

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

The square root of 81896754 is about 9049.6825358683. The cubic root of 81896754 is about 434.2657344616.

The spelling of 81896754 in words is "eighty-one million, eight hundred ninety-six thousand, seven hundred fifty-four".