2166155240526 has 48 divisors (see below), whose sum is σ = 5110711117200. Its totient is φ = 660461122944.

The previous prime is 2166155240521. The next prime is 2166155240537. The reversal of 2166155240526 is 6250425516612.

2166155240526 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 1 + 552 + 40 + 52 + 6 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166155240521) 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, 109193311 + ... + 109213146.

It is an arithmetic number, because the mean of its divisors is an integer number (106473148275).

Almost surely, 2^{2166155240526} is an apocalyptic number.

2166155240526 is an abundant number, since it is smaller than the sum of its proper divisors (2944555876674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166155240526 is a wasteful number, since it uses less digits than its factorization.

2166155240526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218406513 (or 218406510 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 2166155240526 in words is "two trillion, one hundred sixty-six billion, one hundred fifty-five million, two hundred forty thousand, five hundred twenty-six".