2516018538 has 64 divisors (see below), whose sum is σ = 5596439040. Its totient is φ = 747643200.

The previous prime is 2516018521. The next prime is 2516018543. The reversal of 2516018538 is 8358106152.

It is a junction number, because it is equal to n+sod(n) for n = 2516018496 and 2516018505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3064168 + ... + 3064988.

It is an arithmetic number, because the mean of its divisors is an integer number (87444360).

Almost surely, 2^2516018538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2516018538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2798219520).

2516018538 is an abundant number, since it is smaller than the sum of its proper divisors (3080420502).

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

2516018538 is a wasteful number, since it uses less digits than its factorization.

2516018538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 2516018538 is about 50159.9296052138. The cubic root of 2516018538 is about 1360.1013725619.

The spelling of 2516018538 in words is "two billion, five hundred sixteen million, eighteen thousand, five hundred thirty-eight".