18053761261 has 2 divisors, whose sum is σ = 18053761262. Its totient is φ = 18053761260.

The previous prime is 18053761249. The next prime is 18053761273. The reversal of 18053761261 is 16216735081.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (18053761249) and next prime (18053761273).

It can be written as a sum of positive squares in only one way, i.e., 17883980361 + 169780900 = 133731^2 + 13030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18053761261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18053762261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9026880630 + 9026880631.

It is an arithmetic number, because the mean of its divisors is an integer number (9026880631).

Almost surely, 2^18053761261 is an apocalyptic number.

It is an amenable number.

18053761261 is a deficient number, since it is larger than the sum of its proper divisors (1).

18053761261 is an equidigital number, since it uses as much as digits as its factorization.

18053761261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 18053761261 in words is "eighteen billion, fifty-three million, seven hundred sixty-one thousand, two hundred sixty-one".