2491501877 has 2 divisors, whose sum is σ = 2491501878. Its totient is φ = 2491501876.

The previous prime is 2491501847. The next prime is 2491501879. The reversal of 2491501877 is 7781051942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2487914641 + 3587236 = 49879^2 + 1894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2491501877 is a prime.

Together with 2491501879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2491501879) 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, 1245750938 + 1245750939.

It is an arithmetic number, because the mean of its divisors is an integer number (1245750939).

Almost surely, 2^2491501877 is an apocalyptic number.

It is an amenable number.

2491501877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491501877 is an equidigital number, since it uses as much as digits as its factorization.

2491501877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 44.

The square root of 2491501877 is about 49914.9464289004. The cubic root of 2491501877 is about 1355.6692321912.

The spelling of 2491501877 in words is "two billion, four hundred ninety-one million, five hundred one thousand, eight hundred seventy-seven".