638376226313 has 16 divisors (see below), whose sum is σ = 733561367040. Its totient is φ = 544189833216.

The previous prime is 638376226303. The next prime is 638376226333. The reversal of 638376226313 is 313622673836.

It is a cyclic number.

It is not a de Polignac number, because 638376226313 - 2⁴ = 638376226297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (638376226303) 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, 4821248 + ... + 4951886.

It is an arithmetic number, because the mean of its divisors is an integer number (45847585440).

Almost surely, 2^638376226313 is an apocalyptic number.

It is an amenable number.

638376226313 is a deficient number, since it is larger than the sum of its proper divisors (95185140727).

638376226313 is a wasteful number, since it uses less digits than its factorization.

638376226313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134456.

The product of its digits is 3919104, while the sum is 50.

The spelling of 638376226313 in words is "six hundred thirty-eight billion, three hundred seventy-six million, two hundred twenty-six thousand, three hundred thirteen".