1223738523648 has 240 divisors, whose sum is σ = 3658137513030. Its totient is φ = 407686348800.

The previous prime is 1223738523613. The next prime is 1223738523649. The reversal of 1223738523648 is 8463258373221.

1223738523648 is a `hidden beast` number, since 1 + 2 + 2 + 3 + 73 + 8 + 523 + 6 + 48 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1182630150144 + 41108373504 = 1087488^2 + 202752^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1223738523594 and 1223738523603.

It is not an unprimeable number, because it can be changed into a prime (1223738523649) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 679476348 + ... + 679478148.

Almost surely, 2^{1223738523648} is an apocalyptic number.

1223738523648 is a gapful number since it is divisible by the number (18) 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 1223738523648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1829068756515).

1223738523648 is an abundant number, since it is smaller than the sum of its proper divisors (2434398989382).

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

1223738523648 is an frugal number, since it uses more digits than its factorization.

1223738523648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859 (or 1806 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The spelling of 1223738523648 in words is "one trillion, two hundred twenty-three billion, seven hundred thirty-eight million, five hundred twenty-three thousand, six hundred forty-eight".