123242361661 has 8 divisors (see below), whose sum is σ = 127528954200. Its totient is φ = 118958226240.

The previous prime is 123242361623. The next prime is 123242361707. The reversal of 123242361661 is 166163242321.

It can be written as a sum of positive squares in 4 ways, for example, as 3173181561 + 120069180100 = 56331^2 + 346510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123242361661 - 2²⁵ = 123208807229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123242361661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123242361601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511930 + ... + 713131.

It is an arithmetic number, because the mean of its divisors is an integer number (15941119275).

Almost surely, 2^123242361661 is an apocalyptic number.

It is an amenable number.

123242361661 is a deficient number, since it is larger than the sum of its proper divisors (4286592539).

123242361661 is a wasteful number, since it uses less digits than its factorization.

123242361661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228559.

The product of its digits is 62208, while the sum is 37.

The spelling of 123242361661 in words is "one hundred twenty-three billion, two hundred forty-two million, three hundred sixty-one thousand, six hundred sixty-one".