242873977961 has 2 divisors, whose sum is σ = 242873977962. Its totient is φ = 242873977960.

The previous prime is 242873977937. The next prime is 242873977987. The reversal of 242873977961 is 169779378242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232462836736 + 10411141225 = 482144^2 + 102035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242873977961 is a prime.

It is not a weakly prime, because it can be changed into another prime (242873977261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121436988980 + 121436988981.

It is an arithmetic number, because the mean of its divisors is an integer number (121436988981).

Almost surely, 2^242873977961 is an apocalyptic number.

It is an amenable number.

242873977961 is a deficient number, since it is larger than the sum of its proper divisors (1).

242873977961 is an equidigital number, since it uses as much as digits as its factorization.

242873977961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64012032, while the sum is 65.

The spelling of 242873977961 in words is "two hundred forty-two billion, eight hundred seventy-three million, nine hundred seventy-seven thousand, nine hundred sixty-one".