17761741961 has 2 divisors, whose sum is σ = 17761741962. Its totient is φ = 17761741960.

The previous prime is 17761741919. The next prime is 17761741993. The reversal of 17761741961 is 16914716771.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17747301961 + 14440000 = 133219^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 17761741961 - 2¹⁴ = 17761725577 is a prime.

It is not a weakly prime, because it can be changed into another prime (17761741901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8880870980 + 8880870981.

It is an arithmetic number, because the mean of its divisors is an integer number (8880870981).

Almost surely, 2^17761741961 is an apocalyptic number.

It is an amenable number.

17761741961 is a deficient number, since it is larger than the sum of its proper divisors (1).

17761741961 is an equidigital number, since it uses as much as digits as its factorization.

17761741961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 50.

The spelling of 17761741961 in words is "seventeen billion, seven hundred sixty-one million, seven hundred forty-one thousand, nine hundred sixty-one".