38721887005 has 4 divisors (see below), whose sum is σ = 46466264412. Its totient is φ = 30977509600.

The previous prime is 38721886993. The next prime is 38721887047. The reversal of 38721887005 is 50078812783.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50078812783 = 59 ⋅848793437.

It can be written as a sum of positive squares in 2 ways, for example, as 6628239396 + 32093647609 = 81414^2 + 179147^2 .

It is a de Polignac number, because none of the positive numbers 2^k-38721887005 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38721887005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3872188696 + ... + 3872188705.

It is an arithmetic number, because the mean of its divisors is an integer number (11616566103).

Almost surely, 2^38721887005 is an apocalyptic number.

It is an amenable number.

38721887005 is a deficient number, since it is larger than the sum of its proper divisors (7744377407).

38721887005 is an equidigital number, since it uses as much as digits as its factorization.

38721887005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744377406.

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 38721887005 in words is "thirty-eight billion, seven hundred twenty-one million, eight hundred eighty-seven thousand, five".