1261283255760 has 120 divisors (see below), whose sum is σ = 4297744614240. Its totient is φ = 305765630720.

The previous prime is 1261283255741. The next prime is 1261283255773. The reversal of 1261283255760 is 675523821621.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 21687270 + ... + 21745349.

It is an arithmetic number, because the mean of its divisors is an integer number (35814538452).

Almost surely, 2^{1261283255760} is an apocalyptic number.

1261283255760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1261283255760 is an abundant number, since it is smaller than the sum of its proper divisors (3036461358480).

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

1261283255760 is a wasteful number, since it uses less digits than its factorization.

1261283255760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43432657 (or 43432640 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 1261283255760 in words is "one trillion, two hundred sixty-one billion, two hundred eighty-three million, two hundred fifty-five thousand, seven hundred sixty".