1277648468 has 12 divisors (see below), whose sum is σ = 2236335360. Its totient is φ = 638695512.

The previous prime is 1277648467. The next prime is 1277648501. The reversal of 1277648468 is 8648467721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277648461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7796 + ... + 51147.

It is an arithmetic number, because the mean of its divisors is an integer number (186361280).

Almost surely, 2^1277648468 is an apocalyptic number.

It is an amenable number.

1277648468 is a deficient number, since it is larger than the sum of its proper divisors (958686892).

1277648468 is a wasteful number, since it uses less digits than its factorization.

1277648468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64366 (or 64364 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 53.

The square root of 1277648468 is about 35744.2088736064. The cubic root of 1277648468 is about 1085.1017390635.

The spelling of 1277648468 in words is "one billion, two hundred seventy-seven million, six hundred forty-eight thousand, four hundred sixty-eight".