1265900906880 has 192 divisors, whose sum is σ = 4601383628400. Its totient is φ = 319806517248.

The previous prime is 1265900906869. The next prime is 1265900906939. The reversal of 1265900906880 is 886090095621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5674099 + ... + 5892978.

Almost surely, 2^{1265900906880} is an apocalyptic number.

1265900906880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265900906880 is an abundant number, since it is smaller than the sum of its proper divisors (3335482721520).

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

1265900906880 is a wasteful number, since it uses less digits than its factorization.

1265900906880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11567121 (or 11567106 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 1265900906880 in words is "one trillion, two hundred sixty-five billion, nine hundred million, nine hundred six thousand, eight hundred eighty".