139553552569 has 4 divisors (see below), whose sum is σ = 143325270244. Its totient is φ = 135781834896.

The previous prime is 139553552539. The next prime is 139553552597. The reversal of 139553552569 is 965255355931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 965255355931 = 8447 ⋅114271973.

It can be written as a sum of positive squares in 2 ways, for example, as 126157804969 + 13395747600 = 355187^2 + 115740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139553552569 is a prime.

It is a super-2 number, since 2×139553552569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139553552539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885858782 + ... + 1885858855.

It is an arithmetic number, because the mean of its divisors is an integer number (35831317561).

Almost surely, 2^139553552569 is an apocalyptic number.

It is an amenable number.

139553552569 is a deficient number, since it is larger than the sum of its proper divisors (3771717675).

139553552569 is an equidigital number, since it uses as much as digits as its factorization.

139553552569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771717674.

The product of its digits is 27337500, while the sum is 58.

The spelling of 139553552569 in words is "one hundred thirty-nine billion, five hundred fifty-three million, five hundred fifty-two thousand, five hundred sixty-nine".