123453040340 has 48 divisors (see below), whose sum is σ = 305844962304. Its totient is φ = 40961376000.

The previous prime is 123453040259. The next prime is 123453040391. The reversal of 123453040340 is 43040354321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14218361 + ... + 14227040.

It is an arithmetic number, because the mean of its divisors is an integer number (6371770048).

Almost surely, 2^123453040340 is an apocalyptic number.

123453040340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123453040340 is an abundant number, since it is smaller than the sum of its proper divisors (182391921964).

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

123453040340 is a wasteful number, since it uses less digits than its factorization.

123453040340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28445448 (or 28445446 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 123453040340 its reverse (43040354321), we get a palindrome (166493394661).

The spelling of 123453040340 in words is "one hundred twenty-three billion, four hundred fifty-three million, forty thousand, three hundred forty".