81345754 has 32 divisors (see below), whose sum is σ = 145152000. Its totient is φ = 33452160.

The previous prime is 81345749. The next prime is 81345773. The reversal of 81345754 is 45754318.

It is a super-3 number, since 3×81345754³ (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, 77022 + ... + 78070.

It is an arithmetic number, because the mean of its divisors is an integer number (4536000).

Almost surely, 2^81345754 is an apocalyptic number.

81345754 is a deficient number, since it is larger than the sum of its proper divisors (63806246).

81345754 is a wasteful number, since it uses less digits than its factorization.

81345754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278.

The product of its digits is 67200, while the sum is 37.

The square root of 81345754 is about 9019.1881009324. The cubic root of 81345754 is about 433.2896312272.

The spelling of 81345754 in words is "eighty-one million, three hundred forty-five thousand, seven hundred fifty-four".