1275771755405 has 16 divisors (see below), whose sum is σ = 1749662933760. Its totient is φ = 874798369152.

The previous prime is 1275771755399. The next prime is 1275771755417. The reversal of 1275771755405 is 5045571775721.

It is a cyclic number.

It is not a de Polignac number, because 1275771755405 - 2¹⁶ = 1275771689869 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 1703192 + ... + 2335038.

It is an arithmetic number, because the mean of its divisors is an integer number (109353933360).

Almost surely, 2^{1275771755405} is an apocalyptic number.

It is an amenable number.

1275771755405 is a deficient number, since it is larger than the sum of its proper divisors (473891178355).

1275771755405 is an equidigital number, since it uses as much as digits as its factorization.

1275771755405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689548.

The product of its (nonzero) digits is 12005000, while the sum is 56.

The spelling of 1275771755405 in words is "one trillion, two hundred seventy-five billion, seven hundred seventy-one million, seven hundred fifty-five thousand, four hundred five".