1275665265393 has 8 divisors (see below), whose sum is σ = 1774838630208. Its totient is φ = 813467705424.

The previous prime is 1275665265389. The next prime is 1275665265409. The reversal of 1275665265393 is 3935625665721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1275665265393 - 2² = 1275665265389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1275665260393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9243951130 + ... + 9243951267.

It is an arithmetic number, because the mean of its divisors is an integer number (221854828776).

Almost surely, 2^{1275665265393} is an apocalyptic number.

It is an amenable number.

1275665265393 is a deficient number, since it is larger than the sum of its proper divisors (499173364815).

1275665265393 is a wasteful number, since it uses less digits than its factorization.

1275665265393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18487902423.

The product of its digits is 61236000, while the sum is 60.

The spelling of 1275665265393 in words is "one trillion, two hundred seventy-five billion, six hundred sixty-five million, two hundred sixty-five thousand, three hundred ninety-three".