81077711 has 8 divisors (see below), whose sum is σ = 95252304. Its totient is φ = 68037120.

The previous prime is 81077699. The next prime is 81077713. The reversal of 81077711 is 11777018.

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 81077711 - 2²² = 76883407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81077713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283346 + ... + 283631.

It is an arithmetic number, because the mean of its divisors is an integer number (11906538).

Almost surely, 2^81077711 is an apocalyptic number.

81077711 is a deficient number, since it is larger than the sum of its proper divisors (14174593).

81077711 is a wasteful number, since it uses less digits than its factorization.

81077711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567001.

The product of its (nonzero) digits is 2744, while the sum is 32.

The square root of 81077711 is about 9004.3162427805. The cubic root of 81077711 is about 432.8131955773.

The spelling of 81077711 in words is "eighty-one million, seventy-seven thousand, seven hundred eleven".