172361557888 has 64 divisors (see below), whose sum is σ = 374471294400. Its totient is φ = 78544447488.

The previous prime is 172361557877. The next prime is 172361557909. The reversal of 172361557888 is 888755163271.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524131 + ... + 787042.

It is an arithmetic number, because the mean of its divisors is an integer number (5851113975).

Almost surely, 2^172361557888 is an apocalyptic number.

It is an amenable number.

172361557888 is an abundant number, since it is smaller than the sum of its proper divisors (202109736512).

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

172361557888 is a wasteful number, since it uses less digits than its factorization.

172361557888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311279 (or 1311267 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 61.

The spelling of 172361557888 in words is "one hundred seventy-two billion, three hundred sixty-one million, five hundred fifty-seven thousand, eight hundred eighty-eight".