240799691557 has 4 divisors (see below), whose sum is σ = 240814830240. Its totient is φ = 240784552876.

The previous prime is 240799691551. The next prime is 240799691579. The reversal of 240799691557 is 755196997042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 240799691557 - 2³¹ = 238652207909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240799691551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7545457 + ... + 7577302.

It is an arithmetic number, because the mean of its divisors is an integer number (60203707560).

Almost surely, 2^240799691557 is an apocalyptic number.

It is an amenable number.

240799691557 is a deficient number, since it is larger than the sum of its proper divisors (15138683).

240799691557 is a wasteful number, since it uses less digits than its factorization.

240799691557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15138682.

The product of its (nonzero) digits is 42865200, while the sum is 64.

The spelling of 240799691557 in words is "two hundred forty billion, seven hundred ninety-nine million, six hundred ninety-one thousand, five hundred fifty-seven".