127591855920 has 240 divisors, whose sum is σ = 442688523264. Its totient is φ = 32899392000.

The previous prime is 127591855891. The next prime is 127591855927. The reversal of 127591855920 is 29558195721.

127591855920 is a `hidden beast` number, since 1 + 2 + 7 + 59 + 18 + 559 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×127591855920² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127591855927) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52919515 + ... + 52921925.

Almost surely, 2^127591855920 is an apocalyptic number.

127591855920 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 127591855920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221344261632).

127591855920 is an abundant number, since it is smaller than the sum of its proper divisors (315096667344).

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

127591855920 is a wasteful number, since it uses less digits than its factorization.

127591855920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 54.

The spelling of 127591855920 in words is "one hundred twenty-seven billion, five hundred ninety-one million, eight hundred fifty-five thousand, nine hundred twenty".