1271945863000 has 32 divisors (see below), whose sum is σ = 2976353321760. Its totient is φ = 508778344800.

The previous prime is 1271945862911. The next prime is 1271945863037. The reversal of 1271945863000 is 3685491721.

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 7 ways as a sum of consecutive naturals, for example, 635971932 + ... + 635973931.

It is an arithmetic number, because the mean of its divisors is an integer number (93011041305).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1271945863000 = 2543891726000, but 3⋅1271945863000 = 3815837589000 is not.

Almost surely, 2^{1271945863000} is an apocalyptic number.

1271945863000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271945863000 is an abundant number, since it is smaller than the sum of its proper divisors (1704407458760).

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

1271945863000 is a wasteful number, since it uses less digits than its factorization.

1271945863000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271945884 (or 1271945870 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 1271945863000 in words is "one trillion, two hundred seventy-one billion, nine hundred forty-five million, eight hundred sixty-three thousand".