38781913856 has 36 divisors (see below), whose sum is σ = 88471245072. Its totient is φ = 16620819456.

The previous prime is 38781913853. The next prime is 38781913861. The reversal of 38781913856 is 65831918783.

It is a junction number, because it is equal to n+sod(n) for n = 38781913795 and 38781913804.

It is not an unprimeable number, because it can be changed into a prime (38781913853) 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, 10819055 + ... + 10822638.

Almost surely, 2^38781913856 is an apocalyptic number.

It is an amenable number.

38781913856 is an abundant number, since it is smaller than the sum of its proper divisors (49689331216).

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

38781913856 is an equidigital number, since it uses as much as digits as its factorization.

38781913856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21641716 (or 21641702 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 59.

The spelling of 38781913856 in words is "thirty-eight billion, seven hundred eighty-one million, nine hundred thirteen thousand, eight hundred fifty-six".