38715187221855 has 12 divisors (see below), whose sum is σ = 67106324517960. Its totient is φ = 20648099851632.

The previous prime is 38715187221847. The next prime is 38715187221857. The reversal of 38715187221855 is 55812278151783.

38715187221855 is a `hidden beast` number, since 3 + 87 + 1 + 518 + 7 + 22 + 18 + 5 + 5 = 666.

It is not a de Polignac number, because 38715187221855 - 2³ = 38715187221847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38715187221792 and 38715187221801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38715187221857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430168746865 + ... + 430168746954.

It is an arithmetic number, because the mean of its divisors is an integer number (5592193709830).

Almost surely, 2^{38715187221855} is an apocalyptic number.

38715187221855 is a deficient number, since it is larger than the sum of its proper divisors (28391137296105).

38715187221855 is a wasteful number, since it uses less digits than its factorization.

38715187221855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860337493830 (or 860337493827 counting only the distinct ones).

The product of its digits is 37632000, while the sum is 63.

The spelling of 38715187221855 in words is "thirty-eight trillion, seven hundred fifteen billion, one hundred eighty-seven million, two hundred twenty-one thousand, eight hundred fifty-five".