1266015028338 has 16 divisors (see below), whose sum is σ = 2813366729760. Its totient is φ = 422005009428.

The previous prime is 1266015028303. The next prime is 1266015028339. The reversal of 1266015028338 is 8338205106621.

1266015028338 is a `hidden beast` number, since 1 + 2 + 6 + 60 + 1 + 502 + 83 + 3 + 8 = 666.

It is a super-3 number, since 3×1266015028338³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1266015028293 and 1266015028302.

It is not an unprimeable number, because it can be changed into a prime (1266015028339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11722361320 + ... + 11722361427.

It is an arithmetic number, because the mean of its divisors is an integer number (175835420610).

Almost surely, 2^{1266015028338} is an apocalyptic number.

1266015028338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1266015028338 is an abundant number, since it is smaller than the sum of its proper divisors (1547351701422).

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

1266015028338 is a wasteful number, since it uses less digits than its factorization.

1266015028338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23444722758 (or 23444722752 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 1266015028338 in words is "one trillion, two hundred sixty-six billion, fifteen million, twenty-eight thousand, three hundred thirty-eight".