1518640816 has 80 divisors (see below), whose sum is σ = 3861538560. Its totient is φ = 560528640.

The previous prime is 1518640801. The next prime is 1518640901. The reversal of 1518640816 is 6180468151.

It is a super-2 number, since 2×1518640816² = 4612539856042291712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9031 + ... + 55846.

It is an arithmetic number, because the mean of its divisors is an integer number (48269232).

Almost surely, 2^1518640816 is an apocalyptic number.

1518640816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1518640816 is an abundant number, since it is smaller than the sum of its proper divisors (2342897744).

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

1518640816 is a wasteful number, since it uses less digits than its factorization.

1518640816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64922 (or 64916 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1518640816 is about 38969.7423137490. The cubic root of 1518640816 is about 1149.4366026696.

The spelling of 1518640816 in words is "one billion, five hundred eighteen million, six hundred forty thousand, eight hundred sixteen".