3878338706505 has 32 divisors (see below), whose sum is σ = 6919361176320. Its totient is φ = 2061086267520.

The previous prime is 3878338706503. The next prime is 3878338706509. The reversal of 3878338706505 is 5056078338783.

It is not a de Polignac number, because 3878338706505 - 2¹ = 3878338706503 is a prime.

It is a super-2 number, since 2×3878338706505² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3878338706503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51080277 + ... + 51156146.

It is an arithmetic number, because the mean of its divisors is an integer number (216230036760).

Almost surely, 2^{3878338706505} is an apocalyptic number.

It is an amenable number.

3878338706505 is a deficient number, since it is larger than the sum of its proper divisors (3041022469815).

3878338706505 is a wasteful number, since it uses less digits than its factorization.

3878338706505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102236718 (or 102236712 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 63.

The spelling of 3878338706505 in words is "three trillion, eight hundred seventy-eight billion, three hundred thirty-eight million, seven hundred six thousand, five hundred five".