1890498305161 has 8 divisors (see below), whose sum is σ = 1933354803240. Its totient is φ = 1848100165632.

The previous prime is 1890498305009. The next prime is 1890498305177. The reversal of 1890498305161 is 1615038940981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 101645554761 + 1788852750400 = 318819^2 + 1337480^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1890498305161 - 2¹³ = 1890498296969 is a prime.

It is a super-2 number, since 2×1890498305161² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1890498305461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114581296 + ... + 114597793.

It is an arithmetic number, because the mean of its divisors is an integer number (241669350405).

Almost surely, 2^{1890498305161} is an apocalyptic number.

It is an amenable number.

1890498305161 is a deficient number, since it is larger than the sum of its proper divisors (42856498079).

1890498305161 is a wasteful number, since it uses less digits than its factorization.

1890498305161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229179275.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 1890498305161 in words is "one trillion, eight hundred ninety billion, four hundred ninety-eight million, three hundred five thousand, one hundred sixty-one".