1266151439952 has 80 divisors (see below), whose sum is σ = 4153512670080. Its totient is φ = 361757553408.

The previous prime is 1266151439909. The next prime is 1266151439953. The reversal of 1266151439952 is 2599341516621.

It is a happy number.

1266151439952 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 1 + 514 + 39 + 95 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266151439953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209347413 + ... + 209353460.

It is an arithmetic number, because the mean of its divisors is an integer number (51918908376).

Almost surely, 2^{1266151439952} is an apocalyptic number.

1266151439952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1266151439952 is an abundant number, since it is smaller than the sum of its proper divisors (2887361230128).

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

1266151439952 is a wasteful number, since it uses less digits than its factorization.

1266151439952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418700897 (or 418700885 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The spelling of 1266151439952 in words is "one trillion, two hundred sixty-six billion, one hundred fifty-one million, four hundred thirty-nine thousand, nine hundred fifty-two".