123450401440 has 48 divisors (see below), whose sum is σ = 308807555112. Its totient is φ = 46475444224.

The previous prime is 123450401419. The next prime is 123450401471. The reversal of 123450401440 is 44104054321.

It can be written as a sum of positive squares in 4 ways, for example, as 117399428496 + 6050972944 = 342636^2 + 77788^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123450401399 and 123450401408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22690369 + ... + 22695808.

Almost surely, 2^123450401440 is an apocalyptic number.

123450401440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123450401440 is an abundant number, since it is smaller than the sum of its proper divisors (185357153672).

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

123450401440 is a wasteful number, since it uses less digits than its factorization.

123450401440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45386209 (or 45386201 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 123450401440 its reverse (44104054321), we get a palindrome (167554455761).

The spelling of 123450401440 in words is "one hundred twenty-three billion, four hundred fifty million, four hundred one thousand, four hundred forty".