1277197956608 has 160 divisors (see below), whose sum is σ = 2930853556224. Its totient is φ = 544676585472.

The previous prime is 1277197956589. The next prime is 1277197956611. The reversal of 1277197956608 is 8066597917721.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 858908441 + ... + 858909927.

Almost surely, 2^{1277197956608} 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 1277197956608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465426778112).

1277197956608 is an abundant number, since it is smaller than the sum of its proper divisors (1653655599616).

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

1277197956608 is an equidigital number, since it uses as much as digits as its factorization.

1277197956608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532 (or 2516 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 68.

The spelling of 1277197956608 in words is "one trillion, two hundred seventy-seven billion, one hundred ninety-seven million, nine hundred fifty-six thousand, six hundred eight".