81080755 has 8 divisors (see below), whose sum is σ = 111196512. Its totient is φ = 55598208.

The previous prime is 81080749. The next prime is 81080807. The reversal of 81080755 is 55708018.

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

It is a cyclic number.

It is not a de Polignac number, because 81080755 - 2⁷ = 81080627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81080755.

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, 1158262 + ... + 1158331.

It is an arithmetic number, because the mean of its divisors is an integer number (13899564).

Almost surely, 2^81080755 is an apocalyptic number.

81080755 is a deficient number, since it is larger than the sum of its proper divisors (30115757).

81080755 is a wasteful number, since it uses less digits than its factorization.

81080755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316605.

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 81080755 is about 9004.4852712412. The cubic root of 81080755 is about 432.8186120551.

The spelling of 81080755 in words is "eighty-one million, eighty thousand, seven hundred fifty-five".