1277516667928 has 32 divisors (see below), whose sum is σ = 2400532580160. Its totient is φ = 637375577760.

The previous prime is 1277516667901. The next prime is 1277516667949. The reversal of 1277516667928 is 8297666157721.

It is a congruent number.

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, 11212575 + ... + 11325937.

It is an arithmetic number, because the mean of its divisors is an integer number (75016643130).

Almost surely, 2^{1277516667928} is an apocalyptic number.

It is an amenable number.

1277516667928 is a deficient number, since it is larger than the sum of its proper divisors (1123015912232).

1277516667928 is a wasteful number, since it uses less digits than its factorization.

1277516667928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116407 (or 116403 counting only the distinct ones).

The product of its digits is 106686720, while the sum is 67.

The spelling of 1277516667928 in words is "one trillion, two hundred seventy-seven billion, five hundred sixteen million, six hundred sixty-seven thousand, nine hundred twenty-eight".