13856177077 has 2 divisors, whose sum is σ = 13856177078. Its totient is φ = 13856177076.

The previous prime is 13856177039. The next prime is 13856177107. The reversal of 13856177077 is 77077165831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11392146756 + 2464030321 = 106734^2 + 49639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13856177077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13856147077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928088538 + 6928088539.

It is an arithmetic number, because the mean of its divisors is an integer number (6928088539).

Almost surely, 2^13856177077 is an apocalyptic number.

It is an amenable number.

13856177077 is a deficient number, since it is larger than the sum of its proper divisors (1).

13856177077 is an equidigital number, since it uses as much as digits as its factorization.

13856177077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728720, while the sum is 52.

The spelling of 13856177077 in words is "thirteen billion, eight hundred fifty-six million, one hundred seventy-seven thousand, seventy-seven".