13438520623 has 16 divisors (see below), whose sum is σ = 14716745856. Its totient is φ = 12169815840.

The previous prime is 13438520611. The next prime is 13438520647. The reversal of 13438520623 is 32602583431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13438520623 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 (13438520653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3687040 + ... + 3690682.

It is an arithmetic number, because the mean of its divisors is an integer number (919796616).

Almost surely, 2^13438520623 is an apocalyptic number.

13438520623 is a deficient number, since it is larger than the sum of its proper divisors (1278225233).

13438520623 is a wasteful number, since it uses less digits than its factorization.

13438520623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4854.

The product of its (nonzero) digits is 103680, while the sum is 37.

It can be divided in two parts, 13438 and 520623, that added together give a triangular number (534061 = T₁₀₃₃).

The spelling of 13438520623 in words is "thirteen billion, four hundred thirty-eight million, five hundred twenty thousand, six hundred twenty-three".