1277267780780 has 24 divisors (see below), whose sum is σ = 2682748400640. Its totient is φ = 510814529280.

The previous prime is 1277267780753. The next prime is 1277267780801. The reversal of 1277267780780 is 870877627721.

It is a super-2 number, since 2×1277267780780² (a number of 25 digits) contains 22 as substring.

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, 5673260 + ... + 5894099.

It is an arithmetic number, because the mean of its divisors is an integer number (111781183360).

Almost surely, 2^{1277267780780} is an apocalyptic number.

1277267780780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1277267780780 is an abundant number, since it is smaller than the sum of its proper divisors (1405480619860).

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

1277267780780 is a wasteful number, since it uses less digits than its factorization.

1277267780780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11572889 (or 11572887 counting only the distinct ones).

The product of its (nonzero) digits is 25815552, while the sum is 62.

The spelling of 1277267780780 in words is "one trillion, two hundred seventy-seven billion, two hundred sixty-seven million, seven hundred eighty thousand, seven hundred eighty".