1279165255525 has 12 divisors (see below), whose sum is σ = 1655128609632. Its totient is φ = 978839499440.

The previous prime is 1279165255519. The next prime is 1279165255531. The reversal of 1279165255525 is 5255525619721.

It is an interprime number because it is at equal distance from previous prime (1279165255519) and next prime (1279165255531).

It is a de Polignac number, because none of the positive numbers 2^k-1279165255525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1112317039 + ... + 1112318188.

It is an arithmetic number, because the mean of its divisors is an integer number (137927384136).

Almost surely, 2^{1279165255525} is an apocalyptic number.

It is an amenable number.

1279165255525 is a deficient number, since it is larger than the sum of its proper divisors (375963354107).

1279165255525 is a wasteful number, since it uses less digits than its factorization.

1279165255525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224635260 (or 2224635255 counting only the distinct ones).

The product of its digits is 9450000, while the sum is 55.

The spelling of 1279165255525 in words is "one trillion, two hundred seventy-nine billion, one hundred sixty-five million, two hundred fifty-five thousand, five hundred twenty-five".