127661269899 has 16 divisors (see below), whose sum is σ = 173706746400. Its totient is φ = 83379200256.

The previous prime is 127661269873. The next prime is 127661269907. The reversal of 127661269899 is 998962166721.

It is not a de Polignac number, because 127661269899 - 2²¹ = 127659172747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127661269499) 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, 2164164 + ... + 2222369.

It is an arithmetic number, because the mean of its divisors is an integer number (10856671650).

Almost surely, 2^127661269899 is an apocalyptic number.

127661269899 is a deficient number, since it is larger than the sum of its proper divisors (46045476501).

127661269899 is a wasteful number, since it uses less digits than its factorization.

127661269899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4386734.

The product of its digits is 35271936, while the sum is 66.

The spelling of 127661269899 in words is "one hundred twenty-seven billion, six hundred sixty-one million, two hundred sixty-nine thousand, eight hundred ninety-nine".