172019290500 has 144 divisors (see below), whose sum is σ = 542859525936. Its totient is φ = 45855244800.

The previous prime is 172019290477. The next prime is 172019290537. The reversal of 172019290500 is 5092910271.

It can be written as a sum of positive squares in 8 ways, for example, as 117173397636 + 54845892864 = 342306^2 + 234192^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17243514 + ... + 17253486.

It is an arithmetic number, because the mean of its divisors is an integer number (3769857819).

Almost surely, 2^172019290500 is an apocalyptic number.

172019290500 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 172019290500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271429762968).

172019290500 is an abundant number, since it is smaller than the sum of its proper divisors (370840235436).

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

172019290500 is a wasteful number, since it uses less digits than its factorization.

172019290500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13831 (or 13816 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The spelling of 172019290500 in words is "one hundred seventy-two billion, nineteen million, two hundred ninety thousand, five hundred".