264640075640 has 16 divisors (see below), whose sum is σ = 595440170280. Its totient is φ = 105856030240.

The previous prime is 264640075633. The next prime is 264640075643. The reversal of 264640075640 is 46570046462.

It is a junction number, because it is equal to n+sod(n) for n = 264640075591 and 264640075600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264640075643) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3308000906 + ... + 3308000985.

Almost surely, 2^264640075640 is an apocalyptic number.

264640075640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264640075640 is an abundant number, since it is smaller than the sum of its proper divisors (330800094640).

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

264640075640 is a wasteful number, since it uses less digits than its factorization.

264640075640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616001902 (or 6616001898 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 264640075640 in words is "two hundred sixty-four billion, six hundred forty million, seventy-five thousand, six hundred forty".