38691436616 has 64 divisors (see below), whose sum is σ = 84975125760. Its totient is φ = 16169472000.

The previous prime is 38691436613. The next prime is 38691436633. The reversal of 38691436616 is 61663419683.

It is not an unprimeable number, because it can be changed into a prime (38691436613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7323896 + ... + 7329176.

It is an arithmetic number, because the mean of its divisors is an integer number (1327736340).

Almost surely, 2^38691436616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38691436616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42487562880).

38691436616 is an abundant number, since it is smaller than the sum of its proper divisors (46283689144).

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

38691436616 is a wasteful number, since it uses less digits than its factorization.

38691436616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8526 (or 8522 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 53.

The spelling of 38691436616 in words is "thirty-eight billion, six hundred ninety-one million, four hundred thirty-six thousand, six hundred sixteen".