13861173577 has 2 divisors, whose sum is σ = 13861173578. Its totient is φ = 13861173576.

The previous prime is 13861173559. The next prime is 13861173617. The reversal of 13861173577 is 77537116831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11831130441 + 2030043136 = 108771^2 + 45056^2 .

It is a cyclic number.

It is not a de Polignac number, because 13861173577 - 2¹¹ = 13861171529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13861173577.

It is not a weakly prime, because it can be changed into another prime (13861173527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6930586788 + 6930586789.

It is an arithmetic number, because the mean of its divisors is an integer number (6930586789).

Almost surely, 2^13861173577 is an apocalyptic number.

It is an amenable number.

13861173577 is a deficient number, since it is larger than the sum of its proper divisors (1).

13861173577 is an equidigital number, since it uses as much as digits as its factorization.

13861173577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 49.

The spelling of 13861173577 in words is "thirteen billion, eight hundred sixty-one million, one hundred seventy-three thousand, five hundred seventy-seven".