264556642406 has 16 divisors (see below), whose sum is σ = 453532319520. Its totient is φ = 113379756480.

The previous prime is 264556642387. The next prime is 264556642423. The reversal of 264556642406 is 604246655462.

It is a super-2 number, since 2×264556642406² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1627466 + ... + 1782626.

It is an arithmetic number, because the mean of its divisors is an integer number (28345769970).

Almost surely, 2^264556642406 is an apocalyptic number.

264556642406 is a deficient number, since it is larger than the sum of its proper divisors (188975677114).

264556642406 is a wasteful number, since it uses less digits than its factorization.

264556642406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276959.

The product of its (nonzero) digits is 8294400, while the sum is 50.

The spelling of 264556642406 in words is "two hundred sixty-four billion, five hundred fifty-six million, six hundred forty-two thousand, four hundred six".