2166535252413 has 24 divisors (see below), whose sum is σ = 3576701783616. Its totient is φ = 1237951209600.

The previous prime is 2166535252367. The next prime is 2166535252433. The reversal of 2166535252413 is 3142525356612.

2166535252413 is a `hidden beast` number, since 2 + 1 + 6 + 65 + 3 + 52 + 524 + 13 = 666.

It is not a de Polignac number, because 2166535252413 - 2²⁹ = 2165998381501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166535252433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193893 + ... + 2090613.

It is an arithmetic number, because the mean of its divisors is an integer number (149029240984).

Almost surely, 2^{2166535252413} is an apocalyptic number.

It is an amenable number.

2166535252413 is a deficient number, since it is larger than the sum of its proper divisors (1410166531203).

2166535252413 is a wasteful number, since it uses less digits than its factorization.

2166535252413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914865 (or 1914862 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 2166535252413 in words is "two trillion, one hundred sixty-six billion, five hundred thirty-five million, two hundred fifty-two thousand, four hundred thirteen".