1916868361 has 8 divisors (see below), whose sum is σ = 2036562120. Its totient is φ = 1800747648.

The previous prime is 1916868341. The next prime is 1916868389. The reversal of 1916868361 is 1638686191.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 197936761 + 1718931600 = 14069^2 + 41460^2 .

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 1916868361 - 2⁵ = 1916868329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1916868301) 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, 892156 + ... + 894301.

It is an arithmetic number, because the mean of its divisors is an integer number (254570265).

Almost surely, 2^1916868361 is an apocalyptic number.

It is an amenable number.

1916868361 is a deficient number, since it is larger than the sum of its proper divisors (119693759).

1916868361 is a wasteful number, since it uses less digits than its factorization.

1916868361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786523.

The product of its digits is 373248, while the sum is 49.

The square root of 1916868361 is about 43782.0552395613. The cubic root of 1916868361 is about 1242.2168894807.

The spelling of 1916868361 in words is "one billion, nine hundred sixteen million, eight hundred sixty-eight thousand, three hundred sixty-one".