13776275021 has 2 divisors, whose sum is σ = 13776275022. Its totient is φ = 13776275020.

The previous prime is 13776275003. The next prime is 13776275041. The reversal of 13776275021 is 12057267731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13652754025 + 123520996 = 116845^2 + 11114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13776275021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13776275021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13776275041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6888137510 + 6888137511.

It is an arithmetic number, because the mean of its divisors is an integer number (6888137511).

Almost surely, 2^13776275021 is an apocalyptic number.

It is an amenable number.

13776275021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13776275021 is an equidigital number, since it uses as much as digits as its factorization.

13776275021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 41.

The spelling of 13776275021 in words is "thirteen billion, seven hundred seventy-six million, two hundred seventy-five thousand, twenty-one".