123354661860 has 360 divisors, whose sum is σ = 422239250664. Its totient is φ = 30118625280.

The previous prime is 123354661763. The next prime is 123354661861. The reversal of 123354661860 is 68166453321.

123354661860 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 5 + 466 + 186 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 8022426624 + 115332235236 = 89568^2 + 339606^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123354661861) 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 119 ways as a sum of consecutive naturals, for example, 17319100 + ... + 17326220.

Almost surely, 2^123354661860 is an apocalyptic number.

123354661860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123354661860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211119625332).

123354661860 is an abundant number, since it is smaller than the sum of its proper divisors (298884588804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123354661860 is a wasteful number, since it uses less digits than its factorization.

123354661860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7213 (or 7185 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 123354661860 in words is "one hundred twenty-three billion, three hundred fifty-four million, six hundred sixty-one thousand, eight hundred sixty".