264140656 has 20 divisors (see below), whose sum is σ = 551140072. Its totient is φ = 121910976.

The previous prime is 264140633. The next prime is 264140659. The reversal of 264140656 is 656041462.

It is a super-2 number, since 2×264140656² = 139540572304220672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264140659) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 634746 + ... + 635161.

Almost surely, 2^264140656 is an apocalyptic number.

264140656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

264140656 is an abundant number, since it is smaller than the sum of its proper divisors (286999416).

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

264140656 is a wasteful number, since it uses less digits than its factorization.

264140656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269928 (or 1269922 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 264140656 is about 16252.4046220859. The cubic root of 264140656 is about 641.6207747993.

It can be divided in two parts, 2641406 and 56, that added together give a palindrome (2641462).

The spelling of 264140656 in words is "two hundred sixty-four million, one hundred forty thousand, six hundred fifty-six".