1277916412625 has 8 divisors (see below), whose sum is σ = 1594839683112. Its totient is φ = 1022333130000.

The previous prime is 1277916412613. The next prime is 1277916412637. The reversal of 1277916412625 is 5262146197721.

It is an interprime number because it is at equal distance from previous prime (1277916412613) and next prime (1277916412637).

It can be written as a sum of positive squares in 4 ways, for example, as 172039130176 + 1105877282449 = 414776^2 + 1051607^2 .

It is not a de Polignac number, because 1277916412625 - 2¹⁰ = 1277916411601 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 5111665526 + ... + 5111665775.

It is an arithmetic number, because the mean of its divisors is an integer number (199354960389).

Almost surely, 2^{1277916412625} is an apocalyptic number.

It is an amenable number.

1277916412625 is a deficient number, since it is larger than the sum of its proper divisors (316923270487).

1277916412625 is an equidigital number, since it uses as much as digits as its factorization.

1277916412625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10223331316 (or 10223331306 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 53.

The spelling of 1277916412625 in words is "one trillion, two hundred seventy-seven billion, nine hundred sixteen million, four hundred twelve thousand, six hundred twenty-five".