13877116961 has 2 divisors, whose sum is σ = 13877116962.
Its totient is φ = 13877116960.
The previous prime is 13877116943. The next prime is 13877117027. The reversal of 13877116961 is 16961177831.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 12283510561 + 1593606400 = 110831^2 + 39920^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-13877116961 is a prime.
It is not a weakly prime, because it can be changed into another prime (13877116901) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6938558480 + 6938558481.
It is an arithmetic number, because the mean of its divisors is an integer number (6938558481).
Almost surely, 213877116961 is an apocalyptic number.
It is an amenable number.
13877116961 is a deficient number, since it is larger than the sum of its proper divisors (1).
13877116961 is an equidigital number, since it uses as much as digits as its factorization.
13877116961 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 381024, while the sum is 50.
The spelling of 13877116961 in words is "thirteen billion, eight hundred seventy-seven million, one hundred sixteen thousand, nine hundred sixty-one".