1277055511340 has 384 divisors, whose sum is σ = 3311642492928. Its totient is φ = 404564751360.

The previous prime is 1277055511339. The next prime is 1277055511343. The reversal of 1277055511340 is 431155507721.

It is not an unprimeable number, because it can be changed into a prime (1277055511343) 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 127 ways as a sum of consecutive naturals, for example, 1238656625 + ... + 1238657655.

It is an arithmetic number, because the mean of its divisors is an integer number (8624068992).

Almost surely, 2^{1277055511340} is an apocalyptic number.

1277055511340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1277055511340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655821246464).

1277055511340 is an abundant number, since it is smaller than the sum of its proper divisors (2034586981588).

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

1277055511340 is a wasteful number, since it uses less digits than its factorization.

1277055511340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 1277055511340 in words is "one trillion, two hundred seventy-seven billion, fifty-five million, five hundred eleven thousand, three hundred forty".