1277640125265 has 16 divisors (see below), whose sum is σ = 2336256229248. Its totient is φ = 584064057216.

The previous prime is 1277640125257. The next prime is 1277640125287. The reversal of 1277640125265 is 5625210467721.

It is not a de Polignac number, because 1277640125265 - 2³ = 1277640125257 is a prime.

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, 6084000492 + ... + 6084000701.

It is an arithmetic number, because the mean of its divisors is an integer number (146016014328).

Almost surely, 2^{1277640125265} is an apocalyptic number.

1277640125265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1277640125265 is a deficient number, since it is larger than the sum of its proper divisors (1058616103983).

1277640125265 is a wasteful number, since it uses less digits than its factorization.

1277640125265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12168001208.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 1277640125265 in words is "one trillion, two hundred seventy-seven billion, six hundred forty million, one hundred twenty-five thousand, two hundred sixty-five".