42646462409 has 2 divisors, whose sum is σ = 42646462410. Its totient is φ = 42646462408.

The previous prime is 42646462403. The next prime is 42646462421. The reversal of 42646462409 is 90426464624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41534440000 + 1112022409 = 203800^2 + 33347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42646462409 is a prime.

It is not a weakly prime, because it can be changed into another prime (42646462403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21323231204 + 21323231205.

It is an arithmetic number, because the mean of its divisors is an integer number (21323231205).

Almost surely, 2^42646462409 is an apocalyptic number.

It is an amenable number.

42646462409 is a deficient number, since it is larger than the sum of its proper divisors (1).

42646462409 is an equidigital number, since it uses as much as digits as its factorization.

42646462409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 47.

The spelling of 42646462409 in words is "forty-two billion, six hundred forty-six million, four hundred sixty-two thousand, four hundred nine".