1277135453440 has 144 divisors (see below), whose sum is σ = 3813991171200. Its totient is φ = 398068162560.

The previous prime is 1277135453437. The next prime is 1277135453441. The reversal of 1277135453440 is 443545317721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277135453441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6380415 + ... + 6577534.

It is an arithmetic number, because the mean of its divisors is an integer number (26486049800).

Almost surely, 2^{1277135453440} is an apocalyptic number.

1277135453440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1277135453440 is an abundant number, since it is smaller than the sum of its proper divisors (2536855717760).

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

1277135453440 is a wasteful number, since it uses less digits than its factorization.

1277135453440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12957988 (or 12957974 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 46.

The spelling of 1277135453440 in words is "one trillion, two hundred seventy-seven billion, one hundred thirty-five million, four hundred fifty-three thousand, four hundred forty".