38503863138 has 64 divisors (see below), whose sum is σ = 86716772352. Its totient is φ = 11308714560.

The previous prime is 38503863137. The next prime is 38503863143. The reversal of 38503863138 is 83136830583.

It is not an unprimeable number, because it can be changed into a prime (38503863137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 851643 + ... + 895713.

It is an arithmetic number, because the mean of its divisors is an integer number (1354949568).

Almost surely, 2^38503863138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38503863138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43358386176).

38503863138 is an abundant number, since it is smaller than the sum of its proper divisors (48212909214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38503863138 is a wasteful number, since it uses less digits than its factorization.

38503863138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44599.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 38503863138 in words is "thirty-eight billion, five hundred three million, eight hundred sixty-three thousand, one hundred thirty-eight".