2516541649 has 2 divisors, whose sum is σ = 2516541650. Its totient is φ = 2516541648.

The previous prime is 2516541611. The next prime is 2516541673. The reversal of 2516541649 is 9461456152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2419164225 + 97377424 = 49185^2 + 9868^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516541649 - 2¹³ = 2516533457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2516551649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258270824 + 1258270825.

It is an arithmetic number, because the mean of its divisors is an integer number (1258270825).

Almost surely, 2^2516541649 is an apocalyptic number.

It is an amenable number.

2516541649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516541649 is an equidigital number, since it uses as much as digits as its factorization.

2516541649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 43.

The square root of 2516541649 is about 50165.1437653676. The cubic root of 2516541649 is about 1360.1956265953.

The spelling of 2516541649 in words is "two billion, five hundred sixteen million, five hundred forty-one thousand, six hundred forty-nine".