42161540525123 has 2 divisors, whose sum is σ = 42161540525124. Its totient is φ = 42161540525122.

The previous prime is 42161540525081. The next prime is 42161540525179. The reversal of 42161540525123 is 32152504516124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42161540525123 - 2²⁴ = 42161523747907 is a prime.

It is not a weakly prime, because it can be changed into another prime (42161540515123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21080770262561 + 21080770262562.

It is an arithmetic number, because the mean of its divisors is an integer number (21080770262562).

Almost surely, 2^{42161540525123} is an apocalyptic number.

42161540525123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42161540525123 is an equidigital number, since it uses as much as digits as its factorization.

42161540525123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 42161540525123 in words is "forty-two trillion, one hundred sixty-one billion, five hundred forty million, five hundred twenty-five thousand, one hundred twenty-three".