81057754 has 8 divisors (see below), whose sum is σ = 121635360. Its totient is φ = 40512636.

The previous prime is 81057733. The next prime is 81057761. The reversal of 81057754 is 45775018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424 + ... + 12739.

It is an arithmetic number, because the mean of its divisors is an integer number (15204420).

Almost surely, 2^81057754 is an apocalyptic number.

81057754 is a deficient number, since it is larger than the sum of its proper divisors (40577606).

81057754 is a wasteful number, since it uses less digits than its factorization.

81057754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16244.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 81057754 is about 9003.2079838244. The cubic root of 81057754 is about 432.7776808361. Note that the first 3 decimals are identical.

It can be divided in two parts, 810 and 57754, that added together give a square (58564 = 242²).

The spelling of 81057754 in words is "eighty-one million, fifty-seven thousand, seven hundred fifty-four".