123543556461 has 48 divisors (see below), whose sum is σ = 195151686912. Its totient is φ = 74853676800.

The previous prime is 123543556457. The next prime is 123543556481. The reversal of 123543556461 is 164655345321.

It is a happy number.

123543556461 is a `hidden beast` number, since 1 + 2 + 3 + 54 + 3 + 556 + 46 + 1 = 666.

It is not a de Polignac number, because 123543556461 - 2² = 123543556457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123543556481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6311856 + ... + 6331398.

It is an arithmetic number, because the mean of its divisors is an integer number (4065660144).

Almost surely, 2^123543556461 is an apocalyptic number.

It is an amenable number.

123543556461 is a deficient number, since it is larger than the sum of its proper divisors (71608130451).

123543556461 is a wasteful number, since it uses less digits than its factorization.

123543556461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20394 (or 20391 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 123543556461 in words is "one hundred twenty-three billion, five hundred forty-three million, five hundred fifty-six thousand, four hundred sixty-one".