123266294649 has 27 divisors (see below), whose sum is σ = 183051444303. Its totient is φ = 79931236752.

The previous prime is 123266294621. The next prime is 123266294689. The reversal of 123266294649 is 946492662321.

The square root of 123266294649 is 351093.

It is a perfect power (a square), and thus also a powerful number.

123266294649 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 6 + 629 + 4 + 6 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110300373225 + 12965921424 = 332115^2 + 113868^2 .

It is not a de Polignac number, because 123266294649 - 2⁵ = 123266294617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123266294595 and 123266294604.

It is not an unprimeable number, because it can be changed into a prime (123266294609) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 38969742 + ... + 38972904.

Almost surely, 2^123266294649 is an apocalyptic number.

123266294649 is the 351093-rd square number.

123266294649 is the 175547-th centered octagonal number.

It is an amenable number.

123266294649 is a deficient number, since it is larger than the sum of its proper divisors (59785149654).

123266294649 is an frugal number, since it uses more digits than its factorization.

123266294649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406 (or 3203 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 54.

The spelling of 123266294649 in words is "one hundred twenty-three billion, two hundred sixty-six million, two hundred ninety-four thousand, six hundred forty-nine".