1277298131968 has 88 divisors (see below), whose sum is σ = 2690697982400. Its totient is φ = 604369133568.

The previous prime is 1277298131903. The next prime is 1277298131971. The reversal of 1277298131968 is 8691318927721.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17844346 + ... + 17915782.

Almost surely, 2^{1277298131968} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1277298131968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345348991200).

1277298131968 is an abundant number, since it is smaller than the sum of its proper divisors (1413399850432).

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

1277298131968 is an equidigital number, since it uses as much as digits as its factorization.

1277298131968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72395 (or 72377 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 64.

The spelling of 1277298131968 in words is "one trillion, two hundred seventy-seven billion, two hundred ninety-eight million, one hundred thirty-one thousand, nine hundred sixty-eight".