1277625012765 has 16 divisors (see below), whose sum is σ = 2047513163328. Its totient is φ = 680295625856.

The previous prime is 1277625012761. The next prime is 1277625012791. The reversal of 1277625012765 is 5672105267721.

It is a cyclic number.

It is not a de Polignac number, because 1277625012765 - 2² = 1277625012761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1277625012761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69014247 + ... + 69032756.

It is an arithmetic number, because the mean of its divisors is an integer number (127969572708).

Almost surely, 2^{1277625012765} is an apocalyptic number.

1277625012765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1277625012765 is a deficient number, since it is larger than the sum of its proper divisors (769888150563).

1277625012765 is a wasteful number, since it uses less digits than its factorization.

1277625012765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138047628.

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 1277625012765 in words is "one trillion, two hundred seventy-seven billion, six hundred twenty-five million, twelve thousand, seven hundred sixty-five".