618741372761 has 2 divisors, whose sum is σ = 618741372762. Its totient is φ = 618741372760.

The previous prime is 618741372721. The next prime is 618741372779. The reversal of 618741372761 is 167273147816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415999200400 + 202742172361 = 644980^2 + 450269^2 .

It is a cyclic number.

It is not a de Polignac number, because 618741372761 - 2¹⁴ = 618741356377 is a prime.

It is not a weakly prime, because it can be changed into another prime (618741372701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309370686380 + 309370686381.

It is an arithmetic number, because the mean of its divisors is an integer number (309370686381).

Almost surely, 2^618741372761 is an apocalyptic number.

It is an amenable number.

618741372761 is a deficient number, since it is larger than the sum of its proper divisors (1).

618741372761 is an equidigital number, since it uses as much as digits as its factorization.

618741372761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 53.

The spelling of 618741372761 in words is "six hundred eighteen billion, seven hundred forty-one million, three hundred seventy-two thousand, seven hundred sixty-one".