761641943841 has 21 divisors (see below), whose sum is σ = 1141975857729. Its totient is φ = 507745586916.

The previous prime is 761641943819. The next prime is 761641943861. The reversal of 761641943841 is 148349146167.

It is a happy number.

The square root of 761641943841 is 872721.

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

761641943841 is a `hidden beast` number, since 7 + 6 + 164 + 1 + 9 + 438 + 41 = 666.

It is not a de Polignac number, because 761641943841 - 2⁹ = 761641943329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (761641943861) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 23547306 + ... + 23579628.

It is an arithmetic number, because the mean of its divisors is an integer number (54379802749).

Almost surely, 2^761641943841 is an apocalyptic number.

761641943841 is the 872721-st square number.

761641943841 is the 436361-st centered octagonal number.

It is an amenable number.

761641943841 is a deficient number, since it is larger than the sum of its proper divisors (380333913888).

761641943841 is an frugal number, since it uses more digits than its factorization.

761641943841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64664 (or 32326 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 761641943841 in words is "seven hundred sixty-one billion, six hundred forty-one million, nine hundred forty-three thousand, eight hundred forty-one".