42646288164449 has 2 divisors, whose sum is σ = 42646288164450. Its totient is φ = 42646288164448.

The previous prime is 42646288164439. The next prime is 42646288164569. The reversal of 42646288164449 is 94446188264624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30985476931600 + 11660811232849 = 5566460^2 + 3414793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42646288164449 is a prime.

It is not a weakly prime, because it can be changed into another prime (42646288164409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21323144082224 + 21323144082225.

It is an arithmetic number, because the mean of its divisors is an integer number (21323144082225).

Almost surely, 2^{42646288164449} is an apocalyptic number.

It is an amenable number.

42646288164449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42646288164449 is an equidigital number, since it uses as much as digits as its factorization.

42646288164449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 509607936, while the sum is 68.

The spelling of 42646288164449 in words is "forty-two trillion, six hundred forty-six billion, two hundred eighty-eight million, one hundred sixty-four thousand, four hundred forty-nine".