1277916991344 has 120 divisors (see below), whose sum is σ = 4144873853952. Its totient is φ = 359976597120.

The previous prime is 1277916991319. The next prime is 1277916991367. The reversal of 1277916991344 is 4431996197721.

1277916991344 is a `hidden beast` number, since 1 + 277 + 9 + 16 + 9 + 9 + 1 + 344 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8856424 + ... + 8999559.

Almost surely, 2^{1277916991344} is an apocalyptic number.

1277916991344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1277916991344 is an abundant number, since it is smaller than the sum of its proper divisors (2866956862608).

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

1277916991344 is a wasteful number, since it uses less digits than its factorization.

1277916991344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17856075 (or 17856066 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The spelling of 1277916991344 in words is "one trillion, two hundred seventy-seven billion, nine hundred sixteen million, nine hundred ninety-one thousand, three hundred forty-four".