816182380257 has 16 divisors (see below), whose sum is σ = 1104646170432. Its totient is φ = 535922449920.

The previous prime is 816182380253. The next prime is 816182380283. The reversal of 816182380257 is 752083281618.

It is not a de Polignac number, because 816182380257 - 2² = 816182380253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816182380253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107493 + ... + 1690829.

It is an arithmetic number, because the mean of its divisors is an integer number (69040385652).

Almost surely, 2^816182380257 is an apocalyptic number.

It is an amenable number.

816182380257 is a deficient number, since it is larger than the sum of its proper divisors (288463790175).

816182380257 is a wasteful number, since it uses less digits than its factorization.

816182380257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590368.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 816182380257 in words is "eight hundred sixteen billion, one hundred eighty-two million, three hundred eighty thousand, two hundred fifty-seven".