61518281516 has 48 divisors (see below), whose sum is σ = 113266433280. Its totient is φ = 29179275840.

The previous prime is 61518281501. The next prime is 61518281521.

61518281516 is nontrivially palindromic in base 10.

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 15 ways as a sum of consecutive naturals, for example, 8243795 + ... + 8251253.

It is an arithmetic number, because the mean of its divisors is an integer number (2359717360).

Almost surely, 2^61518281516 is an apocalyptic number.

It is an amenable number.

61518281516 is a deficient number, since it is larger than the sum of its proper divisors (51748151764).

61518281516 is a wasteful number, since it uses less digits than its factorization.

61518281516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8214 (or 8212 counting only the distinct ones).

The product of its digits is 115200, while the sum is 44.

The spelling of 61518281516 in words is "sixty-one billion, five hundred eighteen million, two hundred eighty-one thousand, five hundred sixteen".