4218019979401 has 2 divisors, whose sum is σ = 4218019979402. Its totient is φ = 4218019979400.

The previous prime is 4218019979357. The next prime is 4218019979413. The reversal of 4218019979401 is 1049799108124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4217884955001 + 135024400 = 2053749^2 + 11620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4218019979401 is a prime.

It is not a weakly prime, because it can be changed into another prime (4218019979441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109009989700 + 2109009989701.

It is an arithmetic number, because the mean of its divisors is an integer number (2109009989701).

Almost surely, 2^{4218019979401} is an apocalyptic number.

It is an amenable number.

4218019979401 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218019979401 is an equidigital number, since it uses as much as digits as its factorization.

4218019979401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 4218019979401 in words is "four trillion, two hundred eighteen billion, nineteen million, nine hundred seventy-nine thousand, four hundred one".