123458149521 has 12 divisors (see below), whose sum is σ = 203803929472. Its totient is φ = 70547513976.

The previous prime is 123458149511. The next prime is 123458149523. The reversal of 123458149521 is 125941854321.

123458149521 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 5 + 81 + 49 + 521 = 666.

It is not a de Polignac number, because 123458149521 - 2¹⁰ = 123458148497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123458149523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 979826521 + ... + 979826646.

Almost surely, 2^123458149521 is an apocalyptic number.

It is an amenable number.

123458149521 is a deficient number, since it is larger than the sum of its proper divisors (80345779951).

123458149521 is a wasteful number, since it uses less digits than its factorization.

123458149521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959653180 (or 1959653177 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 123458149521 in words is "one hundred twenty-three billion, four hundred fifty-eight million, one hundred forty-nine thousand, five hundred twenty-one".