2516211649 has 16 divisors (see below), whose sum is σ = 2943077760. Its totient is φ = 2106783360.

The previous prime is 2516211647. The next prime is 2516211673. The reversal of 2516211649 is 9461126152.

It is a cyclic number.

It is not a de Polignac number, because 2516211649 - 2¹ = 2516211647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2516211647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27379 + ... + 76039.

It is an arithmetic number, because the mean of its divisors is an integer number (183942360).

Almost surely, 2^2516211649 is an apocalyptic number.

It is an amenable number.

2516211649 is a deficient number, since it is larger than the sum of its proper divisors (426866111).

2516211649 is an equidigital number, since it uses as much as digits as its factorization.

2516211649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48840.

The product of its digits is 25920, while the sum is 37.

The square root of 2516211649 is about 50161.8545211399. The cubic root of 2516211649 is about 1360.1361687836.

The spelling of 2516211649 in words is "two billion, five hundred sixteen million, two hundred eleven thousand, six hundred forty-nine".