264681816 has 64 divisors (see below), whose sum is σ = 772346880. Its totient is φ = 74012160.

The previous prime is 264681803. The next prime is 264681839. The reversal of 264681816 is 618186462.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 8865 + ... + 24656.

It is an arithmetic number, because the mean of its divisors is an integer number (12067920).

Almost surely, 2^264681816 is an apocalyptic number.

It is an amenable number.

264681816 is an abundant number, since it is smaller than the sum of its proper divisors (507665064).

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

264681816 is a wasteful number, since it uses less digits than its factorization.

264681816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33584 (or 33580 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 264681816 is about 16269.0447168849. The cubic root of 264681816 is about 642.0586509047.

The spelling of 264681816 in words is "two hundred sixty-four million, six hundred eighty-one thousand, eight hundred sixteen".