242821247649 has 16 divisors (see below), whose sum is σ = 325813598208. Its totient is φ = 160855539152.

The previous prime is 242821247629. The next prime is 242821247677. The reversal of 242821247649 is 946742128242.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242821247649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242821247609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1383634 + ... + 1549220.

It is an arithmetic number, because the mean of its divisors is an integer number (20363349888).

Almost surely, 2^242821247649 is an apocalyptic number.

It is an amenable number.

242821247649 is a deficient number, since it is larger than the sum of its proper divisors (82992350559).

242821247649 is a wasteful number, since it uses less digits than its factorization.

242821247649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168684.

The product of its digits is 3096576, while the sum is 51.

The spelling of 242821247649 in words is "two hundred forty-two billion, eight hundred twenty-one million, two hundred forty-seven thousand, six hundred forty-nine".