1277961168 has 80 divisors (see below), whose sum is σ = 3618911232. Its totient is φ = 385392000.

The previous prime is 1277961133. The next prime is 1277961173. The reversal of 1277961168 is 8611697721.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105673 + ... + 117143.

Almost surely, 2^1277961168 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 1277961168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1809455616).

1277961168 is an abundant number, since it is smaller than the sum of its proper divisors (2340950064).

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

1277961168 is a wasteful number, since it uses less digits than its factorization.

1277961168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11704 (or 11698 counting only the distinct ones).

The product of its digits is 254016, while the sum is 48.

The square root of 1277961168 is about 35748.5827411381. The cubic root of 1277961168 is about 1085.1902567959.

The spelling of 1277961168 in words is "one billion, two hundred seventy-seven million, nine hundred sixty-one thousand, one hundred sixty-eight".