240261688013 has 8 divisors (see below), whose sum is σ = 242040339000. Its totient is φ = 238483398400.

The previous prime is 240261688001. The next prime is 240261688049. The reversal of 240261688013 is 310886162042.

It can be written as a sum of positive squares in 4 ways, for example, as 52735448164 + 187526239849 = 229642^2 + 433043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240261688013 - 2⁶ = 240261687949 is a prime.

It is a super-2 number, since 2×240261688013² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240261688063) 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 7 ways as a sum of consecutive naturals, for example, 1326113 + ... + 1496361.

It is an arithmetic number, because the mean of its divisors is an integer number (30255042375).

Almost surely, 2^240261688013 is an apocalyptic number.

It is an amenable number.

240261688013 is a deficient number, since it is larger than the sum of its proper divisors (1778650987).

240261688013 is a wasteful number, since it uses less digits than its factorization.

240261688013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180687.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 240261688013 in words is "two hundred forty billion, two hundred sixty-one million, six hundred eighty-eight thousand, thirteen".