123413437640 has 16 divisors (see below), whose sum is σ = 277680234780. Its totient is φ = 49365375040.

The previous prime is 123413437639. The next prime is 123413437687. The reversal of 123413437640 is 46734314321.

It can be written as a sum of positive squares in 2 ways, for example, as 121303137796 + 2110299844 = 348286^2 + 45938^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123413437594 and 123413437603.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1542667931 + ... + 1542668010.

Almost surely, 2^123413437640 is an apocalyptic number.

123413437640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123413437640 is an abundant number, since it is smaller than the sum of its proper divisors (154266797140).

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

123413437640 is a wasteful number, since it uses less digits than its factorization.

123413437640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085335952 (or 3085335948 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 123413437640 in words is "one hundred twenty-three billion, four hundred thirteen million, four hundred thirty-seven thousand, six hundred forty".