127987522091 has 8 divisors (see below), whose sum is σ = 150362963184. Its totient is φ = 107402116320.

The previous prime is 127987522027. The next prime is 127987522097. The reversal of 127987522091 is 190225789721.

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

It is a cyclic number.

It is not a de Polignac number, because 127987522091 - 2⁶ = 127987522027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127987522097) 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, 447508676 + ... + 447508961.

It is an arithmetic number, because the mean of its divisors is an integer number (18795370398).

Almost surely, 2^127987522091 is an apocalyptic number.

127987522091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

127987522091 is a deficient number, since it is larger than the sum of its proper divisors (22375441093).

127987522091 is a wasteful number, since it uses less digits than its factorization.

127987522091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895017661.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 127987522091 in words is "one hundred twenty-seven billion, nine hundred eighty-seven million, five hundred twenty-two thousand, ninety-one".