122513615789 has 4 divisors (see below), whose sum is σ = 126738223260. Its totient is φ = 118289008320.

The previous prime is 122513615767. The next prime is 122513615849. The reversal of 122513615789 is 987516315221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987516315221 = 17 ⋅58089195013.

It can be written as a sum of positive squares in 2 ways, for example, as 101925670564 + 20587945225 = 319258^2 + 143485^2 .

It is a cyclic number.

It is not a de Polignac number, because 122513615789 - 2⁸ = 122513615533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122813615789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2112303692 + ... + 2112303749.

It is an arithmetic number, because the mean of its divisors is an integer number (31684555815).

Almost surely, 2^122513615789 is an apocalyptic number.

It is an amenable number.

122513615789 is a deficient number, since it is larger than the sum of its proper divisors (4224607471).

122513615789 is an equidigital number, since it uses as much as digits as its factorization.

122513615789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224607470.

The product of its digits is 907200, while the sum is 50.

The spelling of 122513615789 in words is "one hundred twenty-two billion, five hundred thirteen million, six hundred fifteen thousand, seven hundred eighty-nine".