638325063503 has 8 divisors (see below), whose sum is σ = 638996413440. Its totient is φ = 637653870360.

The previous prime is 638325063473. The next prime is 638325063529. The reversal of 638325063503 is 305360523836.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-638325063503 is a prime.

It is a super-2 number, since 2×638325063503² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638325063403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9247508 + ... + 9316278.

It is an arithmetic number, because the mean of its divisors is an integer number (79874551680).

Almost surely, 2^638325063503 is an apocalyptic number.

638325063503 is a deficient number, since it is larger than the sum of its proper divisors (671349937).

638325063503 is a wasteful number, since it uses less digits than its factorization.

638325063503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78397.

The product of its (nonzero) digits is 1166400, while the sum is 44.

The spelling of 638325063503 in words is "six hundred thirty-eight billion, three hundred twenty-five million, sixty-three thousand, five hundred three".