1896620161 has 8 divisors (see below), whose sum is σ = 1905558824. Its totient is φ = 1887701760.

The previous prime is 1896620153. The next prime is 1896620179. The reversal of 1896620161 is 1610266981.

It can be written as a sum of positive squares in 4 ways, for example, as 540225 + 1896079936 = 735^2 + 43544^2 .

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 1896620161 - 2³ = 1896620153 is a prime.

It is a super-2 number, since 2×1896620161² = 7194336070223331842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1896621161) 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, 201991 + ... + 211171.

It is an arithmetic number, because the mean of its divisors is an integer number (238194853).

Almost surely, 2^1896620161 is an apocalyptic number.

It is an amenable number.

1896620161 is a deficient number, since it is larger than the sum of its proper divisors (8938663).

1896620161 is an equidigital number, since it uses as much as digits as its factorization.

1896620161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10131.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1896620161 is about 43550.2027664625. The cubic root of 1896620161 is about 1237.8274829790.

The spelling of 1896620161 in words is "one billion, eight hundred ninety-six million, six hundred twenty thousand, one hundred sixty-one".