1918844801 has 2 divisors, whose sum is σ = 1918844802. Its totient is φ = 1918844800.

The previous prime is 1918844777. The next prime is 1918844831. The reversal of 1918844801 is 1084488191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1797844801 + 121000000 = 42401^2 + 11000^2 .

It is a cyclic number.

It is not a de Polignac number, because 1918844801 - 2¹⁰ = 1918843777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1918844831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959422400 + 959422401.

It is an arithmetic number, because the mean of its divisors is an integer number (959422401).

Almost surely, 2^1918844801 is an apocalyptic number.

It is an amenable number.

1918844801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918844801 is an equidigital number, since it uses as much as digits as its factorization.

1918844801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 44.

The square root of 1918844801 is about 43804.6207722427. The cubic root of 1918844801 is about 1242.6436834918.

The spelling of 1918844801 in words is "one billion, nine hundred eighteen million, eight hundred forty-four thousand, eight hundred one".