2601587491 has 2 divisors, whose sum is σ = 2601587492. Its totient is φ = 2601587490.

The previous prime is 2601587489. The next prime is 2601587509. The reversal of 2601587491 is 1947851062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2601587491 - 2¹ = 2601587489 is a prime.

Together with 2601587489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2601587291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1300793745 + 1300793746.

It is an arithmetic number, because the mean of its divisors is an integer number (1300793746).

Almost surely, 2^2601587491 is an apocalyptic number.

2601587491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2601587491 is an equidigital number, since it uses as much as digits as its factorization.

2601587491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 2601587491 is about 51005.7593904845. The cubic root of 2601587491 is about 1375.3486703211.

The spelling of 2601587491 in words is "two billion, six hundred one million, five hundred eighty-seven thousand, four hundred ninety-one".