4991846401 has 2 divisors, whose sum is σ = 4991846402. Its totient is φ = 4991846400.

The previous prime is 4991846389. The next prime is 4991846407. The reversal of 4991846401 is 1046481994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3969126001 + 1022720400 = 63001^2 + 31980^2 .

It is a cyclic number.

It is not a de Polignac number, because 4991846401 - 2⁵ = 4991846369 is a prime.

It is not a weakly prime, because it can be changed into another prime (4991846407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495923200 + 2495923201.

It is an arithmetic number, because the mean of its divisors is an integer number (2495923201).

Almost surely, 2^4991846401 is an apocalyptic number.

It is an amenable number.

4991846401 is a deficient number, since it is larger than the sum of its proper divisors (1).

4991846401 is an equidigital number, since it uses as much as digits as its factorization.

4991846401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 4991846401 is about 70652.9999433853. Note that the first 4 decimals coincide. The cubic root of 4991846401 is about 1709.0459437574.

The spelling of 4991846401 in words is "four billion, nine hundred ninety-one million, eight hundred forty-six thousand, four hundred one".