229639442591880 has 128 divisors (see below), whose sum is σ = 765468546595200. Its totient is φ = 61236885655296.

The previous prime is 229639442591879. The next prime is 229639442591899. The reversal of 229639442591880 is 88195244936922.

229639442591880 is a `hidden beast` number, since 2 + 2 + 9 + 6 + 39 + 4 + 425 + 91 + 8 + 80 = 666.

It is a Cunningham number, because it is equal to 15153859²-1.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 229639442591799 and 229639442591808.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 302698314 + ... + 303456006.

It is an arithmetic number, because the mean of its divisors is an integer number (5980223020275).

Almost surely, 2^{229639442591880} is an apocalyptic number.

229639442591880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

229639442591880 is an abundant number, since it is smaller than the sum of its proper divisors (535829104003320).

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

229639442591880 is a wasteful number, since it uses less digits than its factorization.

229639442591880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038340 (or 1038330 counting only the distinct ones).

The product of its (nonzero) digits is 537477120, while the sum is 72.

The spelling of 229639442591880 in words is "two hundred twenty-nine trillion, six hundred thirty-nine billion, four hundred forty-two million, five hundred ninety-one thousand, eight hundred eighty".