127900000549 has 4 divisors (see below), whose sum is σ = 128256268320. Its totient is φ = 127543732780.

The previous prime is 127900000537. The next prime is 127900000643. The reversal of 127900000549 is 945000009721.

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 127900000549 - 2⁵ = 127900000517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127900070549) 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, 178133347 + ... + 178134064.

It is an arithmetic number, because the mean of its divisors is an integer number (32064067080).

Almost surely, 2^127900000549 is an apocalyptic number.

It is an amenable number.

127900000549 is a deficient number, since it is larger than the sum of its proper divisors (356267771).

127900000549 is an equidigital number, since it uses as much as digits as its factorization.

127900000549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356267770.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 127900000549 in words is "one hundred twenty-seven billion, nine hundred million, five hundred forty-nine", and thus it is an aban number.