190541621985 has 128 divisors (see below), whose sum is σ = 391469137920. Its totient is φ = 77671526400.

The previous prime is 190541621929. The next prime is 190541621987. The reversal of 190541621985 is 589126145091.

190541621985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 190541621985 - 2¹⁰ = 190541620961 is a prime.

It is a super-2 number, since 2×190541621985² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (190541621987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1046136 + ... + 1214694.

It is an arithmetic number, because the mean of its divisors is an integer number (3058352640).

Almost surely, 2^190541621985 is an apocalyptic number.

190541621985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190541621985 is an abundant number, since it is smaller than the sum of its proper divisors (200927515935).

190541621985 is a wasteful number, since it uses less digits than its factorization.

190541621985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168639.

The product of its (nonzero) digits is 777600, while the sum is 51.

The spelling of 190541621985 in words is "one hundred ninety billion, five hundred forty-one million, six hundred twenty-one thousand, nine hundred eighty-five".