761765969969 has 4 divisors (see below), whose sum is σ = 761767780644. Its totient is φ = 761764159296.

The previous prime is 761765969911. The next prime is 761765969971. The reversal of 761765969969 is 969969567167.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 743483685025 + 18282284944 = 862255^2 + 135212^2 .

It is a cyclic number.

It is not a de Polignac number, because 761765969969 - 2¹⁶ = 761765904433 is a prime.

It is a super-2 number, since 2×761765969969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 761765969893 and 761765969902.

It is not an unprimeable number, because it can be changed into a prime (761765969369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91829 + ... + 1237725.

It is an arithmetic number, because the mean of its divisors is an integer number (190441945161).

Almost surely, 2^761765969969 is an apocalyptic number.

It is an amenable number.

761765969969 is a deficient number, since it is larger than the sum of its proper divisors (1810675).

761765969969 is a wasteful number, since it uses less digits than its factorization.

761765969969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810674.

The product of its digits is 2083248720, while the sum is 80.

The spelling of 761765969969 in words is "seven hundred sixty-one billion, seven hundred sixty-five million, nine hundred sixty-nine thousand, nine hundred sixty-nine".