127604982991 has 4 divisors (see below), whose sum is σ = 127651336992. Its totient is φ = 127558628992.

The previous prime is 127604982961. The next prime is 127604983049. The reversal of 127604982991 is 199289406721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 127604982991 - 2¹³ = 127604974799 is a prime.

It is a super-4 number, since 4×127604982991⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127604982961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23172871 + ... + 23178376.

It is an arithmetic number, because the mean of its divisors is an integer number (31912834248).

Almost surely, 2^127604982991 is an apocalyptic number.

127604982991 is a deficient number, since it is larger than the sum of its proper divisors (46354001).

127604982991 is an equidigital number, since it uses as much as digits as its factorization.

127604982991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46354000.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 127604982991 in words is "one hundred twenty-seven billion, six hundred four million, nine hundred eighty-two thousand, nine hundred ninety-one".