2166530253011 has 32 divisors (see below), whose sum is σ = 2337540560640. Its totient is φ = 2003731019136.

The previous prime is 2166530252993. The next prime is 2166530253031. The reversal of 2166530253011 is 1103520356612.

It is a cyclic number.

It is not a de Polignac number, because 2166530253011 - 2⁶ = 2166530252947 is a prime.

It is a super-2 number, since 2×2166530253011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166530253031) 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, 137088236 + ... + 137104038.

It is an arithmetic number, because the mean of its divisors is an integer number (73048142520).

Almost surely, 2^{2166530253011} is an apocalyptic number.

2166530253011 is a deficient number, since it is larger than the sum of its proper divisors (171010307629).

2166530253011 is a wasteful number, since it uses less digits than its factorization.

2166530253011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17843.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 2166530253011 in words is "two trillion, one hundred sixty-six billion, five hundred thirty million, two hundred fifty-three thousand, eleven".