2161254626523 has 14 divisors (see below), whose sum is σ = 3240399598884. Its totient is φ = 1440836417196.

The previous prime is 2161254626417. The next prime is 2161254626527. The reversal of 2161254626523 is 3256264521612.

2161254626523 is a `hidden beast` number, since 2 + 1 + 6 + 12 + 5 + 4 + 626 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 2161254626523 - 2¹⁴ = 2161254610139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161254626527) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1482341265 + ... + 1482342722.

It is an arithmetic number, because the mean of its divisors is an integer number (231457114206).

Almost surely, 2^{2161254626523} is an apocalyptic number.

2161254626523 is a deficient number, since it is larger than the sum of its proper divisors (1079144972361).

2161254626523 is an frugal number, since it uses more digits than its factorization.

2161254626523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964684005 (or 2964683990 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 2161254626523 in words is "two trillion, one hundred sixty-one billion, two hundred fifty-four million, six hundred twenty-six thousand, five hundred twenty-three".