123783601648 has 160 divisors (see below), whose sum is σ = 292692377600. Its totient is φ = 50630469120.

The previous prime is 123783601621. The next prime is 123783601687. The reversal of 123783601648 is 846106387321.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12414361 + ... + 12424327.

It is an arithmetic number, because the mean of its divisors is an integer number (1829327360).

Almost surely, 2^123783601648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123783601648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146346188800).

123783601648 is an abundant number, since it is smaller than the sum of its proper divisors (168908775952).

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

123783601648 is an equidigital number, since it uses as much as digits as its factorization.

123783601648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10100 (or 10080 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

Adding to 123783601648 its reverse (846106387321), we get a palindrome (969889988969).

The spelling of 123783601648 in words is "one hundred twenty-three billion, seven hundred eighty-three million, six hundred one thousand, six hundred forty-eight".