38781135478550 has 24 divisors (see below), whose sum is σ = 72135556857000. Its totient is φ = 15511885402880.

The previous prime is 38781135478507. The next prime is 38781135478619. The reversal of 38781135478550 is 5587453118783.

It is a hoax number, since the sum of its digits (65) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12841115 + ... + 15571014.

It is an arithmetic number, because the mean of its divisors is an integer number (3005648202375).

Almost surely, 2^{38781135478550} is an apocalyptic number.

38781135478550 is a deficient number, since it is larger than the sum of its proper divisors (33354421378450).

38781135478550 is a wasteful number, since it uses less digits than its factorization.

38781135478550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28439440 (or 28439435 counting only the distinct ones).

The product of its (nonzero) digits is 112896000, while the sum is 65.

The spelling of 38781135478550 in words is "thirty-eight trillion, seven hundred eighty-one billion, one hundred thirty-five million, four hundred seventy-eight thousand, five hundred fifty".