1277265761364 has 48 divisors (see below), whose sum is σ = 3196335401280. Its totient is φ = 395736756480.

The previous prime is 1277265761363. The next prime is 1277265761441. The reversal of 1277265761364 is 4631675627721.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277265761363) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 52837377 + ... + 52861544.

It is an arithmetic number, because the mean of its divisors is an integer number (66590320860).

Almost surely, 2^{1277265761364} is an apocalyptic number.

It is an amenable number.

1277265761364 is an abundant number, since it is smaller than the sum of its proper divisors (1919069639916).

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

1277265761364 is a wasteful number, since it uses less digits than its factorization.

1277265761364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105699000 (or 105698998 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 57.

The spelling of 1277265761364 in words is "one trillion, two hundred seventy-seven billion, two hundred sixty-five million, seven hundred sixty-one thousand, three hundred sixty-four".