240040420605 has 36 divisors (see below), whose sum is σ = 426465760500. Its totient is φ = 124899041280.

The previous prime is 240040420603. The next prime is 240040420651. The reversal of 240040420605 is 506024040042.

It can be written as a sum of positive squares in 6 ways, for example, as 160501191876 + 79539228729 = 400626^2 + 282027^2 .

It is not a de Polignac number, because 240040420605 - 2¹ = 240040420603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240040420601) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1510980 + ... + 1662269.

It is an arithmetic number, because the mean of its divisors is an integer number (11846271125).

Almost surely, 2^240040420605 is an apocalyptic number.

It is an amenable number.

240040420605 is a deficient number, since it is larger than the sum of its proper divisors (186425339895).

240040420605 is a wasteful number, since it uses less digits than its factorization.

240040420605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173342 (or 3173298 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 240040420605 its reverse (506024040042), we get a palindrome (746064460647).

The spelling of 240040420605 in words is "two hundred forty billion, forty million, four hundred twenty thousand, six hundred five".