123530451129 has 48 divisors (see below), whose sum is σ = 189679638720. Its totient is φ = 77249894400.

The previous prime is 123530451103. The next prime is 123530451157. The reversal of 123530451129 is 921154035321.

It is a happy number.

123530451129 is a `hidden beast` number, since 1 + 2 + 3 + 530 + 4 + 5 + 112 + 9 = 666.

It is not a de Polignac number, because 123530451129 - 2⁵ = 123530451097 is a prime.

It is a super-2 number, since 2×123530451129² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123530451093 and 123530451102.

It is not an unprimeable number, because it can be changed into a prime (123530451169) 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, 23204262 + ... + 23209584.

It is an arithmetic number, because the mean of its divisors is an integer number (3951659140).

Almost surely, 2^123530451129 is an apocalyptic number.

123530451129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

123530451129 is a deficient number, since it is larger than the sum of its proper divisors (66149187591).

123530451129 is a wasteful number, since it uses less digits than its factorization.

123530451129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6662 (or 6659 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 123530451129 in words is "one hundred twenty-three billion, five hundred thirty million, four hundred fifty-one thousand, one hundred twenty-nine".