12169880677 has 4 divisors (see below), whose sum is σ = 12171950316. Its totient is φ = 12167811040.

The previous prime is 12169880669. The next prime is 12169880693. The reversal of 12169880677 is 77608896121.

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 7539622561 + 4630258116 = 86831^2 + 68046^2 .

It is a cyclic number.

It is not a de Polignac number, because 12169880677 - 2³ = 12169880669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12169880647) 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, 1025974 + ... + 1037767.

It is an arithmetic number, because the mean of its divisors is an integer number (3042987579).

Almost surely, 2^12169880677 is an apocalyptic number.

It is an amenable number.

12169880677 is a deficient number, since it is larger than the sum of its proper divisors (2069639).

12169880677 is an equidigital number, since it uses as much as digits as its factorization.

12169880677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069638.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 12169880677 in words is "twelve billion, one hundred sixty-nine million, eight hundred eighty thousand, six hundred seventy-seven".