127769011491 has 16 divisors (see below), whose sum is σ = 186061224960. Its totient is φ = 77346018720.

The previous prime is 127769011481. The next prime is 127769011567. The reversal of 127769011491 is 194110967721.

It is a happy number.

It is not a de Polignac number, because 127769011491 - 2³⁰ = 126695269667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127769011491.

It is not an unprimeable number, because it can be changed into a prime (127769011441) 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, 2214736 + ... + 2271693.

It is an arithmetic number, because the mean of its divisors is an integer number (11628826560).

Almost surely, 2^127769011491 is an apocalyptic number.

127769011491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

127769011491 is a deficient number, since it is larger than the sum of its proper divisors (58292213469).

127769011491 is a wasteful number, since it uses less digits than its factorization.

127769011491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487306.

The product of its (nonzero) digits is 190512, while the sum is 48.

The spelling of 127769011491 in words is "one hundred twenty-seven billion, seven hundred sixty-nine million, eleven thousand, four hundred ninety-one".