638863465154 has 16 divisors (see below), whose sum is σ = 1014044158080. Its totient is φ = 301239966720.

The previous prime is 638863465129. The next prime is 638863465159. The reversal of 638863465154 is 451564368836.

It is a super-3 number, since 3×638863465154³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638863465093 and 638863465102.

It is not an unprimeable number, because it can be changed into a prime (638863465159) 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, 97801919 + ... + 97808450.

It is an arithmetic number, because the mean of its divisors is an integer number (63377759880).

Almost surely, 2^638863465154 is an apocalyptic number.

638863465154 is a deficient number, since it is larger than the sum of its proper divisors (375180692926).

638863465154 is a wasteful number, since it uses less digits than its factorization.

638863465154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195610465.

The product of its digits is 49766400, while the sum is 59.

The spelling of 638863465154 in words is "six hundred thirty-eight billion, eight hundred sixty-three million, four hundred sixty-five thousand, one hundred fifty-four".