1266564100164 has 96 divisors (see below), whose sum is σ = 3235003537920. Its totient is φ = 382496083200.

The previous prime is 1266564100157. The next prime is 1266564100187. The reversal of 1266564100164 is 4610014656621.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163360512 + ... + 163368264.

It is an arithmetic number, because the mean of its divisors is an integer number (33697953520).

Almost surely, 2^{1266564100164} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266564100164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1617501768960).

1266564100164 is an abundant number, since it is smaller than the sum of its proper divisors (1968439437756).

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

1266564100164 is a wasteful number, since it uses less digits than its factorization.

1266564100164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11841 (or 11839 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

Adding to 1266564100164 its reverse (4610014656621), we get a palindrome (5876578756785).

The spelling of 1266564100164 in words is "one trillion, two hundred sixty-six billion, five hundred sixty-four million, one hundred thousand, one hundred sixty-four".