42445452187 has 2 divisors, whose sum is σ = 42445452188. Its totient is φ = 42445452186.

The previous prime is 42445452121. The next prime is 42445452229. The reversal of 42445452187 is 78125454424.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42445452187 - 2²³ = 42437063579 is a prime.

It is a super-2 number, since 2×42445452187² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42445452587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21222726093 + 21222726094.

It is an arithmetic number, because the mean of its divisors is an integer number (21222726094).

Almost surely, 2^42445452187 is an apocalyptic number.

42445452187 is a deficient number, since it is larger than the sum of its proper divisors (1).

42445452187 is an equidigital number, since it uses as much as digits as its factorization.

42445452187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1433600, while the sum is 46.

The spelling of 42445452187 in words is "forty-two billion, four hundred forty-five million, four hundred fifty-two thousand, one hundred eighty-seven".