2491164001 has 2 divisors, whose sum is σ = 2491164002. Its totient is φ = 2491164000.

The previous prime is 2491163981. The next prime is 2491164041. The reversal of 2491164001 is 1004611942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2213608401 + 277555600 = 47049^2 + 16660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2491164001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2491164041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245582000 + 1245582001.

It is an arithmetic number, because the mean of its divisors is an integer number (1245582001).

Almost surely, 2^2491164001 is an apocalyptic number.

It is an amenable number.

2491164001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491164001 is an equidigital number, since it uses as much as digits as its factorization.

2491164001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2491164001 is about 49911.5617968422. The cubic root of 2491164001 is about 1355.6079480305.

Adding to 2491164001 its reverse (1004611942), we get a palindrome (3495775943).

The spelling of 2491164001 in words is "two billion, four hundred ninety-one million, one hundred sixty-four thousand, one".