1266023564160 has 128 divisors (see below), whose sum is σ = 4038927096960. Its totient is φ = 337315399680.

The previous prime is 1266023564131. The next prime is 1266023564177. The reversal of 1266023564160 is 614653206621.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1949475 + ... + 2516445.

It is an arithmetic number, because the mean of its divisors is an integer number (31554117945).

Almost surely, 2^{1266023564160} is an apocalyptic number.

1266023564160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266023564160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2019463548480).

1266023564160 is an abundant number, since it is smaller than the sum of its proper divisors (2772903532800).

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

1266023564160 is a wasteful number, since it uses less digits than its factorization.

1266023564160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568156 (or 568144 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 1266023564160 in words is "one trillion, two hundred sixty-six billion, twenty-three million, five hundred sixty-four thousand, one hundred sixty".