127765263809 has 4 divisors (see below), whose sum is σ = 127909959216. Its totient is φ = 127620568404.

The previous prime is 127765263799. The next prime is 127765263841. The reversal of 127765263809 is 908362567721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127765263809 - 2¹⁶ = 127765198273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127765266809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72346379 + ... + 72348144.

It is an arithmetic number, because the mean of its divisors is an integer number (31977489804).

Almost surely, 2^127765263809 is an apocalyptic number.

It is an amenable number.

127765263809 is a deficient number, since it is larger than the sum of its proper divisors (144695407).

127765263809 is an equidigital number, since it uses as much as digits as its factorization.

127765263809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144695406.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 127765263809 in words is "one hundred twenty-seven billion, seven hundred sixty-five million, two hundred sixty-three thousand, eight hundred nine".