181278482057 has 16 divisors (see below), whose sum is σ = 192260818512. Its totient is φ = 170331832320.

The previous prime is 181278482017. The next prime is 181278482069. The reversal of 181278482057 is 750284872181.

It can be written as a sum of positive squares in 8 ways, for example, as 10310521 + 181268171536 = 3211^2 + 425756^2 .

It is a cyclic number.

It is not a de Polignac number, because 181278482057 - 2⁸ = 181278481801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181278482017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39743057 + ... + 39747617.

It is an arithmetic number, because the mean of its divisors is an integer number (12016301157).

Almost surely, 2^181278482057 is an apocalyptic number.

181278482057 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

181278482057 is a deficient number, since it is larger than the sum of its proper divisors (10982336455).

181278482057 is a wasteful number, since it uses less digits than its factorization.

181278482057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7948.

The product of its (nonzero) digits is 2007040, while the sum is 53.

The spelling of 181278482057 in words is "one hundred eighty-one billion, two hundred seventy-eight million, four hundred eighty-two thousand, fifty-seven".