172045590640 has 160 divisors (see below), whose sum is σ = 507162539520. Its totient is φ = 52715596800.

The previous prime is 172045590631. The next prime is 172045590697. The reversal of 172045590640 is 46095540271.

It is a congruent number.

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, 126750 + ... + 600130.

It is an arithmetic number, because the mean of its divisors is an integer number (3169765872).

Almost surely, 2^172045590640 is an apocalyptic number.

172045590640 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 172045590640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253581269760).

172045590640 is an abundant number, since it is smaller than the sum of its proper divisors (335116948880).

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

172045590640 is a wasteful number, since it uses less digits than its factorization.

172045590640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473471 (or 473465 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 172045590640 in words is "one hundred seventy-two billion, forty-five million, five hundred ninety thousand, six hundred forty".