243621645725707 has 2 divisors, whose sum is σ = 243621645725708. Its totient is φ = 243621645725706.

The previous prime is 243621645725687. The next prime is 243621645725729. The reversal of 243621645725707 is 707527546126342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243621645725707 - 2¹⁵ = 243621645692939 is a prime.

It is a super-2 number, since 2×243621645725707² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243621645125707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121810822862853 + 121810822862854.

It is an arithmetic number, because the mean of its divisors is an integer number (121810822862854).

Almost surely, 2^{243621645725707} is an apocalyptic number.

243621645725707 is a deficient number, since it is larger than the sum of its proper divisors (1).

243621645725707 is an equidigital number, since it uses as much as digits as its factorization.

243621645725707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118540800, while the sum is 61.

The spelling of 243621645725707 in words is "two hundred forty-three trillion, six hundred twenty-one billion, six hundred forty-five million, seven hundred twenty-five thousand, seven hundred seven".