123400532115 has 24 divisors (see below), whose sum is σ = 244450578528. Its totient is φ = 56411671680.

The previous prime is 123400532113. The next prime is 123400532119. The reversal of 123400532115 is 511235004321.

123400532115 is a `hidden beast` number, since 12 + 3 + 4 + 0 + 0 + 532 + 115 = 666.

It is not a de Polignac number, because 123400532115 - 2¹ = 123400532113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123400532113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195873546 + ... + 195874175.

It is an arithmetic number, because the mean of its divisors is an integer number (10185440772).

Almost surely, 2^123400532115 is an apocalyptic number.

123400532115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123400532115 is a deficient number, since it is larger than the sum of its proper divisors (121050046413).

123400532115 is a wasteful number, since it uses less digits than its factorization.

123400532115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391747739 (or 391747736 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 123400532115 its reverse (511235004321), we get a palindrome (634635536436).

The spelling of 123400532115 in words is "one hundred twenty-three billion, four hundred million, five hundred thirty-two thousand, one hundred fifteen".