127823719890 has 32 divisors (see below), whose sum is σ = 308334185280. Its totient is φ = 33913296704.

The previous prime is 127823719879. The next prime is 127823719913. The reversal of 127823719890 is 98917328721.

It is a super-2 number, since 2×127823719890² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 127823719890.

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, 10808280 + ... + 10820099.

It is an arithmetic number, because the mean of its divisors is an integer number (9635443290).

Almost surely, 2^127823719890 is an apocalyptic number.

127823719890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127823719890 is an abundant number, since it is smaller than the sum of its proper divisors (180510465390).

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

127823719890 is a wasteful number, since it uses less digits than its factorization.

127823719890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21628586.

The product of its (nonzero) digits is 3048192, while the sum is 57.

The spelling of 127823719890 in words is "one hundred twenty-seven billion, eight hundred twenty-three million, seven hundred nineteen thousand, eight hundred ninety".