2491885601 has 2 divisors, whose sum is σ = 2491885602. Its totient is φ = 2491885600.

The previous prime is 2491885579. The next prime is 2491885633. The reversal of 2491885601 is 1065881942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1814845201 + 677040400 = 42601^2 + 26020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2491885601 - 2²⁶ = 2424776737 is a prime.

It is a super-2 number, since 2×2491885601² = 12418987696942262402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2491885661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245942800 + 1245942801.

It is an arithmetic number, because the mean of its divisors is an integer number (1245942801).

Almost surely, 2^2491885601 is an apocalyptic number.

It is an amenable number.

2491885601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491885601 is an equidigital number, since it uses as much as digits as its factorization.

2491885601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 2491885601 is about 49918.7900594556. The cubic root of 2491885601 is about 1355.7388255720.

The spelling of 2491885601 in words is "two billion, four hundred ninety-one million, eight hundred eighty-five thousand, six hundred one".