264236740646 has 4 divisors (see below), whose sum is σ = 396355110972. Its totient is φ = 132118370322.

The previous prime is 264236740633. The next prime is 264236740697. The reversal of 264236740646 is 646047632462.

264236740646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646047632462 = 2 ⋅323023816231.

It is a junction number, because it is equal to n+sod(n) for n = 264236740594 and 264236740603.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 66059185160 + ... + 66059185163.

It is an arithmetic number, because the mean of its divisors is an integer number (99088777743).

Almost surely, 2^264236740646 is an apocalyptic number.

264236740646 is a deficient number, since it is larger than the sum of its proper divisors (132118370326).

264236740646 is a wasteful number, since it uses less digits than its factorization.

264236740646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132118370325.

The product of its (nonzero) digits is 6967296, while the sum is 50.

The spelling of 264236740646 in words is "two hundred sixty-four billion, two hundred thirty-six million, seven hundred forty thousand, six hundred forty-six".