39542625665089 has 4 divisors (see below), whose sum is σ = 39543478272340. Its totient is φ = 39541773057840.

The previous prime is 39542625665077. The next prime is 39542625665159. The reversal of 39542625665089 is 98056652624593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31470304825600 + 8072320839489 = 5609840^2 + 2841183^2 .

It is a cyclic number.

It is not a de Polignac number, because 39542625665089 - 2²⁵ = 39542592110657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39542625065089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426234054 + ... + 426326815.

It is an arithmetic number, because the mean of its divisors is an integer number (9885869568085).

Almost surely, 2^{39542625665089} is an apocalyptic number.

It is an amenable number.

39542625665089 is a deficient number, since it is larger than the sum of its proper divisors (852607251).

39542625665089 is an equidigital number, since it uses as much as digits as its factorization.

39542625665089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852607250.

The product of its (nonzero) digits is 839808000, while the sum is 70.

The spelling of 39542625665089 in words is "thirty-nine trillion, five hundred forty-two billion, six hundred twenty-five million, six hundred sixty-five thousand, eighty-nine".