2516231646 has 48 divisors (see below), whose sum is σ = 5595361200. Its totient is φ = 816925824.

The previous prime is 2516231633. The next prime is 2516231651. The reversal of 2516231646 is 6461326152.

2516231646 is a `hidden beast` number, since 2 + 5 + 1 + 6 + 2 + 3 + 1 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2516231646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104890 + ... + 126626.

It is an arithmetic number, because the mean of its divisors is an integer number (116570025).

Almost surely, 2^2516231646 is an apocalyptic number.

2516231646 is an abundant number, since it is smaller than the sum of its proper divisors (3079129554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2516231646 is a wasteful number, since it uses less digits than its factorization.

2516231646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21913 (or 21910 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2516231646 is about 50162.0538455115. The cubic root of 2516231646 is about 1360.1397718948.

Adding to 2516231646 its reverse (6461326152), we get a palindrome (8977557798).

The spelling of 2516231646 in words is "two billion, five hundred sixteen million, two hundred thirty-one thousand, six hundred forty-six".