13123515040 has 48 divisors (see below), whose sum is σ = 31441011840. Its totient is φ = 5175466240.

The previous prime is 13123514977. The next prime is 13123515059. The reversal of 13123515040 is 4051532131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13123514996 and 13123515014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566260 + ... + 588979.

It is an arithmetic number, because the mean of its divisors is an integer number (655021080).

Almost surely, 2^13123515040 is an apocalyptic number.

13123515040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123515040 is an abundant number, since it is smaller than the sum of its proper divisors (18317496800).

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

13123515040 is a wasteful number, since it uses less digits than its factorization.

13123515040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155325 (or 1155317 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 13123515040 in words is "thirteen billion, one hundred twenty-three million, five hundred fifteen thousand, forty".