190445657920 has 672 divisors, whose sum is σ = 607436651520. Its totient is φ = 56295751680.

The previous prime is 190445657893. The next prime is 190445657929. The reversal of 190445657920 is 29756544091.

190445657920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190445657929) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 157003234 + ... + 157004446.

Almost surely, 2^190445657920 is an apocalyptic number.

190445657920 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 190445657920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303718325760).

190445657920 is an abundant number, since it is smaller than the sum of its proper divisors (416990993600).

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

190445657920 is a wasteful number, since it uses less digits than its factorization.

190445657920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 190445657920 in words is "one hundred ninety billion, four hundred forty-five million, six hundred fifty-seven thousand, nine hundred twenty".