42165625499 has 2 divisors, whose sum is σ = 42165625500. Its totient is φ = 42165625498.

The previous prime is 42165625483. The next prime is 42165625519. The reversal of 42165625499 is 99452656124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42165625499 - 2⁴ = 42165625483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42165625499.

It is not a weakly prime, because it can be changed into another prime (42165628499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21082812749 + 21082812750.

It is an arithmetic number, because the mean of its divisors is an integer number (21082812750).

Almost surely, 2^42165625499 is an apocalyptic number.

42165625499 is a deficient number, since it is larger than the sum of its proper divisors (1).

42165625499 is an equidigital number, since it uses as much as digits as its factorization.

42165625499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 53.

It can be divided in two parts, 42165625 and 499, that added together give a palindrome (42166124).

The spelling of 42165625499 in words is "forty-two billion, one hundred sixty-five million, six hundred twenty-five thousand, four hundred ninety-nine".