242728190749 has 4 divisors (see below), whose sum is σ = 264794389920. Its totient is φ = 220661991580.

The previous prime is 242728190741. The next prime is 242728190753. The reversal of 242728190749 is 947091827242.

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 242728190749 - 2³ = 242728190741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242728190749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242728190741) 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, 11033099569 + ... + 11033099590.

It is an arithmetic number, because the mean of its divisors is an integer number (66198597480).

Almost surely, 2^242728190749 is an apocalyptic number.

It is an amenable number.

242728190749 is a deficient number, since it is larger than the sum of its proper divisors (22066199171).

242728190749 is a wasteful number, since it uses less digits than its factorization.

242728190749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22066199170.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 242728190749 in words is "two hundred forty-two billion, seven hundred twenty-eight million, one hundred ninety thousand, seven hundred forty-nine".