127243722506440 has 128 divisors (see below), whose sum is σ = 308132507721600. Its totient is φ = 47114613780480.

The previous prime is 127243722506429. The next prime is 127243722506441. The reversal of 127243722506440 is 44605227342721.

It is not an unprimeable number, because it can be changed into a prime (127243722506441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576752071 + ... + 576972649.

It is an arithmetic number, because the mean of its divisors is an integer number (2407285216575).

Almost surely, 2^{127243722506440} is an apocalyptic number.

127243722506440 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 127243722506440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154066253860800).

127243722506440 is an abundant number, since it is smaller than the sum of its proper divisors (180888785215160).

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

127243722506440 is a wasteful number, since it uses less digits than its factorization.

127243722506440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234575 (or 234571 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 49.

The spelling of 127243722506440 in words is "one hundred twenty-seven trillion, two hundred forty-three billion, seven hundred twenty-two million, five hundred six thousand, four hundred forty".