42461621117 has 2 divisors, whose sum is σ = 42461621118. Its totient is φ = 42461621116.

The previous prime is 42461621101. The next prime is 42461621129. The reversal of 42461621117 is 71112616424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36657314521 + 5804306596 = 191461^2 + 76186^2 .

It is a cyclic number.

It is not a de Polignac number, because 42461621117 - 2⁴ = 42461621101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42461621197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21230810558 + 21230810559.

It is an arithmetic number, because the mean of its divisors is an integer number (21230810559).

Almost surely, 2^42461621117 is an apocalyptic number.

It is an amenable number.

42461621117 is a deficient number, since it is larger than the sum of its proper divisors (1).

42461621117 is an equidigital number, since it uses as much as digits as its factorization.

42461621117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The spelling of 42461621117 in words is "forty-two billion, four hundred sixty-one million, six hundred twenty-one thousand, one hundred seventeen".