38649987216 has 225 divisors, whose sum is σ = 115435153251. Its totient is φ = 12484632384.

The previous prime is 38649987199. The next prime is 38649987217. The reversal of 38649987216 is 61278994683.

The square root of 38649987216 is 196596.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (38649987217) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 304330545 + ... + 304330671.

Almost surely, 2^38649987216 is an apocalyptic number.

38649987216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

38649987216 is the 196596-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38649987216

38649987216 is an abundant number, since it is smaller than the sum of its proper divisors (76785166035).

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

38649987216 is an equidigital number, since it uses as much as digits as its factorization.

38649987216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 175 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 38649987216 in words is "thirty-eight billion, six hundred forty-nine million, nine hundred eighty-seven thousand, two hundred sixteen".