139545664637 has 2 divisors, whose sum is σ = 139545664638. Its totient is φ = 139545664636.

The previous prime is 139545664589. The next prime is 139545664639. The reversal of 139545664637 is 736466545931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125793646276 + 13752018361 = 354674^2 + 117269^2 .

It is a cyclic number.

It is not a de Polignac number, because 139545664637 - 2²⁶ = 139478555773 is a prime.

Together with 139545664639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139545664639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69772832318 + 69772832319.

It is an arithmetic number, because the mean of its divisors is an integer number (69772832319).

Almost surely, 2^139545664637 is an apocalyptic number.

It is an amenable number.

139545664637 is a deficient number, since it is larger than the sum of its proper divisors (1).

139545664637 is an equidigital number, since it uses as much as digits as its factorization.

139545664637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48988800, while the sum is 59.

The spelling of 139545664637 in words is "one hundred thirty-nine billion, five hundred forty-five million, six hundred sixty-four thousand, six hundred thirty-seven".