172083017550 has 24 divisors (see below), whose sum is σ = 426765883896. Its totient is φ = 45888804640.

The previous prime is 172083017543. The next prime is 172083017593. The reversal of 172083017550 is 55710380271.

It is a super-2 number, since 2×172083017550² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172083017499 and 172083017508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 573609909 + ... + 573610208.

It is an arithmetic number, because the mean of its divisors is an integer number (17781911829).

Almost surely, 2^172083017550 is an apocalyptic number.

172083017550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172083017550 is an abundant number, since it is smaller than the sum of its proper divisors (254682866346).

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

172083017550 is a wasteful number, since it uses less digits than its factorization.

172083017550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147220132 (or 1147220127 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 172083017550 in words is "one hundred seventy-two billion, eighty-three million, seventeen thousand, five hundred fifty".