190321649550 has 288 divisors, whose sum is σ = 560185217280. Its totient is φ = 46117785600.

The previous prime is 190321649513. The next prime is 190321649593. The reversal of 190321649550 is 55946123091.

190321649550 is a `hidden beast` number, since 1 + 9 + 0 + 32 + 1 + 64 + 9 + 550 = 666.

190321649550 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 190321649496 and 190321649505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 154858336 + ... + 154859564.

It is an arithmetic number, because the mean of its divisors is an integer number (1945087560).

Almost surely, 2^190321649550 is an apocalyptic number.

190321649550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190321649550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280092608640).

190321649550 is an abundant number, since it is smaller than the sum of its proper divisors (369863567730).

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

190321649550 is a wasteful number, since it uses less digits than its factorization.

190321649550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948 (or 1940 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 190321649550 in words is "one hundred ninety billion, three hundred twenty-one million, six hundred forty-nine thousand, five hundred fifty".