127249835920 has 80 divisors (see below), whose sum is σ = 302718035520. Its totient is φ = 49729946112.

The previous prime is 127249835897. The next prime is 127249835957. The reversal of 127249835920 is 29538942721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686662 + ... + 852058.

It is an arithmetic number, because the mean of its divisors is an integer number (3783975444).

Almost surely, 2^127249835920 is an apocalyptic number.

127249835920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 127249835920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151359017760).

127249835920 is an abundant number, since it is smaller than the sum of its proper divisors (175468199600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127249835920 is a wasteful number, since it uses less digits than its factorization.

127249835920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165632 (or 165626 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 127249835920 in words is "one hundred twenty-seven billion, two hundred forty-nine million, eight hundred thirty-five thousand, nine hundred twenty".