1761908462161 has 3 divisors (see below), whose sum is σ = 1761909789531. Its totient is φ = 1761907134792.

The previous prime is 1761908462143. The next prime is 1761908462203. The reversal of 1761908462161 is 1612648091671.

It is a happy number.

The square root of 1761908462161 is 1327369.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 266081620561 + 1495826841600 = 515831^2 + 1223040^2 .

It is not a de Polignac number, because 1761908462161 - 2¹¹ = 1761908460113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1761908462099 and 1761908462108.

It is not an unprimeable number, because it can be changed into a prime (1761908462101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 663685 + ... + 1991053.

It is an arithmetic number, because the mean of its divisors is an integer number (587303263177).

Almost surely, 2^{1761908462161} is an apocalyptic number.

1761908462161 is the 1327369-th square number.

1761908462161 is the 663685-th centered octagonal number.

It is an amenable number.

1761908462161 is a deficient number, since it is larger than the sum of its proper divisors (1327370).

1761908462161 is an frugal number, since it uses more digits than its factorization.

1761908462161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654738 (or 1327369 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 1761908462161 in words is "one trillion, seven hundred sixty-one billion, nine hundred eight million, four hundred sixty-two thousand, one hundred sixty-one".