240099394561 has 4 divisors (see below), whose sum is σ = 258568578772. Its totient is φ = 221630210352.

The previous prime is 240099394519. The next prime is 240099394567. The reversal of 240099394561 is 165493990042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21281266161 + 218818128400 = 145881^2 + 467780^2 .

It is a cyclic number.

It is not a de Polignac number, because 240099394561 - 2²⁹ = 239562523649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240099394499 and 240099394508.

It is not an unprimeable number, because it can be changed into a prime (240099394567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9234592086 + ... + 9234592111.

It is an arithmetic number, because the mean of its divisors is an integer number (64642144693).

Almost surely, 2^240099394561 is an apocalyptic number.

It is an amenable number.

240099394561 is a deficient number, since it is larger than the sum of its proper divisors (18469184211).

240099394561 is a wasteful number, since it uses less digits than its factorization.

240099394561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18469184210.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 240099394561 in words is "two hundred forty billion, ninety-nine million, three hundred ninety-four thousand, five hundred sixty-one".