638315065144 has 16 divisors (see below), whose sum is σ = 1196991658800. Its totient is φ = 319117289472.

The previous prime is 638315065123. The next prime is 638315065147. The reversal of 638315065144 is 441560513836.

It is a super-2 number, since 2×638315065144² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638315065094 and 638315065103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638315065147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4962924 + ... + 5089915.

It is an arithmetic number, because the mean of its divisors is an integer number (74811978675).

Almost surely, 2^638315065144 is an apocalyptic number.

It is an amenable number.

638315065144 is a deficient number, since it is larger than the sum of its proper divisors (558676593656).

638315065144 is a wasteful number, since it uses less digits than its factorization.

638315065144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060782 (or 10060778 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 638315065144 in words is "six hundred thirty-eight billion, three hundred fifteen million, sixty-five thousand, one hundred forty-four".