123515063134 has 4 divisors (see below), whose sum is σ = 185272594704. Its totient is φ = 61757531566.

The previous prime is 123515063129. The next prime is 123515063171. The reversal of 123515063134 is 431360515321.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123515063134.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30878765782 + ... + 30878765785.

It is an arithmetic number, because the mean of its divisors is an integer number (46318148676).

Almost surely, 2^123515063134 is an apocalyptic number.

123515063134 is a deficient number, since it is larger than the sum of its proper divisors (61757531570).

123515063134 is an equidigital number, since it uses as much as digits as its factorization.

123515063134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61757531569.

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 123515063134 its reverse (431360515321), we get a palindrome (554875578455).

The spelling of 123515063134 in words is "one hundred twenty-three billion, five hundred fifteen million, sixty-three thousand, one hundred thirty-four".