38778581369 has 16 divisors (see below), whose sum is σ = 44504424000. Its totient is φ = 33460701120.

The previous prime is 38778581329. The next prime is 38778581383. The reversal of 38778581369 is 96318587783.

It is a de Polignac number, because none of the positive numbers 2^k-38778581369 is a prime.

It is a super-2 number, since 2×38778581369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38778581329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1011374 + ... + 1049015.

It is an arithmetic number, because the mean of its divisors is an integer number (2781526500).

Almost surely, 2^38778581369 is an apocalyptic number.

It is an amenable number.

38778581369 is a deficient number, since it is larger than the sum of its proper divisors (5725842631).

38778581369 is a wasteful number, since it uses less digits than its factorization.

38778581369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060488.

The product of its digits is 60963840, while the sum is 65.

The spelling of 38778581369 in words is "thirty-eight billion, seven hundred seventy-eight million, five hundred eighty-one thousand, three hundred sixty-nine".