2166072515715 has 32 divisors (see below), whose sum is σ = 3504831068160. Its totient is φ = 1142201620736.

The previous prime is 2166072515713. The next prime is 2166072515743. The reversal of 2166072515715 is 5175152706612.

It is a cyclic number.

It is not a de Polignac number, because 2166072515715 - 2¹ = 2166072515713 is a prime.

It is a super-2 number, since 2×2166072515715² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2166072515713) 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, 50231854 + ... + 50274956.

It is an arithmetic number, because the mean of its divisors is an integer number (109525970880).

Almost surely, 2^{2166072515715} is an apocalyptic number.

2166072515715 is a deficient number, since it is larger than the sum of its proper divisors (1338758552445).

2166072515715 is a wasteful number, since it uses less digits than its factorization.

2166072515715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80843.

The product of its (nonzero) digits is 882000, while the sum is 48.

The spelling of 2166072515715 in words is "two trillion, one hundred sixty-six billion, seventy-two million, five hundred fifteen thousand, seven hundred fifteen".