123545512556 has 6 divisors (see below), whose sum is σ = 216204646980. Its totient is φ = 61772756276.

The previous prime is 123545512549. The next prime is 123545512561. The reversal of 123545512556 is 655215545321.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15443189066 + ... + 15443189073.

It is an arithmetic number, because the mean of its divisors is an integer number (36034107830).

Almost surely, 2^123545512556 is an apocalyptic number.

It is an amenable number.

123545512556 is a deficient number, since it is larger than the sum of its proper divisors (92659134424).

123545512556 is a wasteful number, since it uses less digits than its factorization.

123545512556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30886378143 (or 30886378141 counting only the distinct ones).

The product of its digits is 900000, while the sum is 44.

The spelling of 123545512556 in words is "one hundred twenty-three billion, five hundred forty-five million, five hundred twelve thousand, five hundred fifty-six".