264353326778 has 4 divisors (see below), whose sum is σ = 396529990170. Its totient is φ = 132176663388.

The previous prime is 264353326729. The next prime is 264353326793. The reversal of 264353326778 is 877623353462.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 262253579449 + 2099747329 = 512107^2 + 45823^2 .

It is a super-2 number, since 2×264353326778² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66088331693 + ... + 66088331696.

Almost surely, 2^264353326778 is an apocalyptic number.

264353326778 is a deficient number, since it is larger than the sum of its proper divisors (132176663392).

264353326778 is a wasteful number, since it uses less digits than its factorization.

264353326778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132176663391.

The product of its digits is 30481920, while the sum is 56.

The spelling of 264353326778 in words is "two hundred sixty-four billion, three hundred fifty-three million, three hundred twenty-six thousand, seven hundred seventy-eight".