81184880057 has 8 divisors (see below), whose sum is σ = 82024450560. Its totient is φ = 80346297600.

The previous prime is 81184880041. The next prime is 81184880059. The reversal of 81184880057 is 75008848118.

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 81184880057 - 2⁴ = 81184880041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81184879987 and 81184880014.

It is not an unprimeable number, because it can be changed into a prime (81184880059) 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, 81257 + ... + 411062.

It is an arithmetic number, because the mean of its divisors is an integer number (10253056320).

Almost surely, 2^81184880057 is an apocalyptic number.

It is an amenable number.

81184880057 is a deficient number, since it is larger than the sum of its proper divisors (839570503).

81184880057 is a wasteful number, since it uses less digits than its factorization.

81184880057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494023.

The product of its (nonzero) digits is 573440, while the sum is 50.

The spelling of 81184880057 in words is "eighty-one billion, one hundred eighty-four million, eight hundred eighty thousand, fifty-seven".