2516340644 has 12 divisors (see below), whose sum is σ = 4404173004. Its totient is φ = 1258005504.

The previous prime is 2516340583. The next prime is 2516340667. The reversal of 2516340644 is 4460436152.

It can be written as a sum of positive squares in 2 ways, for example, as 2205241600 + 311099044 = 46960^2 + 17638^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2897 + ... + 71000.

It is an arithmetic number, because the mean of its divisors is an integer number (367014417).

Almost surely, 2^2516340644 is an apocalyptic number.

It is an amenable number.

2516340644 is a deficient number, since it is larger than the sum of its proper divisors (1887832360).

2516340644 is a wasteful number, since it uses less digits than its factorization.

2516340644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82414 (or 82412 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 2516340644 is about 50163.1402924498. The cubic root of 2516340644 is about 1360.1594111007.

Adding to 2516340644 its reverse (4460436152), we get a palindrome (6976776796).

The spelling of 2516340644 in words is "two billion, five hundred sixteen million, three hundred forty thousand, six hundred forty-four".