816598271655 has 24 divisors (see below), whose sum is σ = 1415565466848. Its totient is φ = 435479551296.

The previous prime is 816598271647. The next prime is 816598271659. The reversal of 816598271655 is 556172895618.

816598271655 is a `hidden beast` number, since 8 + 1 + 6 + 598 + 27 + 16 + 5 + 5 = 666.

It is not a de Polignac number, because 816598271655 - 2³ = 816598271647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 816598271592 and 816598271601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816598271659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 318747 + ... + 1317116.

It is an arithmetic number, because the mean of its divisors is an integer number (58981894452).

Almost surely, 2^816598271655 is an apocalyptic number.

816598271655 is a deficient number, since it is larger than the sum of its proper divisors (598967195193).

816598271655 is a wasteful number, since it uses less digits than its factorization.

816598271655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646967 (or 1646964 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 63.

The spelling of 816598271655 in words is "eight hundred sixteen billion, five hundred ninety-eight million, two hundred seventy-one thousand, six hundred fifty-five".