123777481620 has 192 divisors, whose sum is σ = 382113333504. Its totient is φ = 29752012800.

The previous prime is 123777481601. The next prime is 123777481631. The reversal of 123777481620 is 26184777321.

It is a self number, because there is not a number n which added to its sum of digits gives 123777481620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5740179 + ... + 5761701.

It is an arithmetic number, because the mean of its divisors is an integer number (1990173612).

Almost surely, 2^123777481620 is an apocalyptic number.

123777481620 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 123777481620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191056666752).

123777481620 is an abundant number, since it is smaller than the sum of its proper divisors (258335851884).

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

123777481620 is a wasteful number, since it uses less digits than its factorization.

123777481620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21722 (or 21720 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 48.

The spelling of 123777481620 in words is "one hundred twenty-three billion, seven hundred seventy-seven million, four hundred eighty-one thousand, six hundred twenty".