123540550441540 has 48 divisors (see below), whose sum is σ = 271116798365952. Its totient is φ = 47240048169216.

The previous prime is 123540550441513. The next prime is 123540550441559. The reversal of 123540550441540 is 45144055045321.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 1528170249 + ... + 1528251088.

It is an arithmetic number, because the mean of its divisors is an integer number (5648266632624).

Almost surely, 2^{123540550441540} is an apocalyptic number.

123540550441540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123540550441540 is an abundant number, since it is smaller than the sum of its proper divisors (147576247924412).

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

123540550441540 is a wasteful number, since it uses less digits than its factorization.

123540550441540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056421436 (or 3056421434 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 43.

The spelling of 123540550441540 in words is "one hundred twenty-three trillion, five hundred forty billion, five hundred fifty million, four hundred forty-one thousand, five hundred forty".