123543607557 has 8 divisors (see below), whose sum is σ = 165408316480. Its totient is φ = 82020651840.

The previous prime is 123543607543. The next prime is 123543607591. The reversal of 123543607557 is 755706345321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123543607557 - 2⁴ = 123543607541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123543607457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85437457 + ... + 85438902.

It is an arithmetic number, because the mean of its divisors is an integer number (20676039560).

Almost surely, 2^123543607557 is an apocalyptic number.

It is an amenable number.

123543607557 is a deficient number, since it is larger than the sum of its proper divisors (41864708923).

123543607557 is a wasteful number, since it uses less digits than its factorization.

123543607557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170876603.

The product of its (nonzero) digits is 2646000, while the sum is 48.

The spelling of 123543607557 in words is "one hundred twenty-three billion, five hundred forty-three million, six hundred seven thousand, five hundred fifty-seven".