81775383367 has 8 divisors (see below), whose sum is σ = 82511918640. Its totient is φ = 81039073920.

The previous prime is 81775383359. The next prime is 81775383377. The reversal of 81775383367 is 76338357718.

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 81775383367 - 2³ = 81775383359 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 (81775383377) 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, 718692 + ... + 824662.

It is an arithmetic number, because the mean of its divisors is an integer number (10313989830).

Almost surely, 2^81775383367 is an apocalyptic number.

81775383367 is a deficient number, since it is larger than the sum of its proper divisors (736535273).

81775383367 is a wasteful number, since it uses less digits than its factorization.

81775383367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112913.

The product of its digits is 17781120, while the sum is 58.

The spelling of 81775383367 in words is "eighty-one billion, seven hundred seventy-five million, three hundred eighty-three thousand, three hundred sixty-seven".