123451023258 has 48 divisors (see below), whose sum is σ = 270829409760. Its totient is φ = 40635094752.

The previous prime is 123451023233. The next prime is 123451023271. The reversal of 123451023258 is 852320154321.

123451023258 is a `hidden beast` number, since 123 + 451 + 0 + 2 + 32 + 58 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3287553 + ... + 3324891.

It is an arithmetic number, because the mean of its divisors is an integer number (5642279370).

Almost surely, 2^123451023258 is an apocalyptic number.

123451023258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

123451023258 is an abundant number, since it is smaller than the sum of its proper divisors (147378386502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123451023258 is a wasteful number, since it uses less digits than its factorization.

123451023258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39643 (or 39640 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 123451023258 its reverse (852320154321), we get a palindrome (975771177579).

The spelling of 123451023258 in words is "one hundred twenty-three billion, four hundred fifty-one million, twenty-three thousand, two hundred fifty-eight".