1272777876720 has 240 divisors, whose sum is σ = 5065970757120. Its totient is φ = 290920626432.

The previous prime is 1272777876703. The next prime is 1272777876731. The reversal of 1272777876720 is 276787772721.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (63).

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 47 ways as a sum of consecutive naturals, for example, 4540500 + ... + 4812659.

It is an arithmetic number, because the mean of its divisors is an integer number (21108211488).

Almost surely, 2^{1272777876720} is an apocalyptic number.

1272777876720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272777876720 is an abundant number, since it is smaller than the sum of its proper divisors (3793192880400).

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

1272777876720 is an equidigital number, since it uses as much as digits as its factorization.

1272777876720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9353194 (or 9353176 counting only the distinct ones).

The product of its (nonzero) digits is 45177216, while the sum is 63.

The spelling of 1272777876720 in words is "one trillion, two hundred seventy-two billion, seven hundred seventy-seven million, eight hundred seventy-six thousand, seven hundred twenty".