45640767769 has 3 divisors (see below), whose sum is σ = 45640981407. Its totient is φ = 45640554132.

The previous prime is 45640767751. The next prime is 45640767779. The reversal of 45640767769 is 96776704654.

The square root of 45640767769 is 213637.

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., 26593455625 + 19047312144 = 163075^2 + 138012^2 .

It is a de Polignac number, because none of the positive numbers 2^k-45640767769 is a prime.

It is a super-2 number, since 2×45640767769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45640767719) 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, 106819 + ... + 320455.

It is an arithmetic number, because the mean of its divisors is an integer number (15213660469).

Almost surely, 2^45640767769 is an apocalyptic number.

45640767769 is the 213637-th square number.

45640767769 is the 106819-th centered octagonal number.

It is an amenable number.

45640767769 is a deficient number, since it is larger than the sum of its proper divisors (213638).

45640767769 is an frugal number, since it uses more digits than its factorization.

45640767769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427274 (or 213637 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 61.

It can be divided in two parts, 456407 and 67769, that added together give a square (524176 = 724²).

The spelling of 45640767769 in words is "forty-five billion, six hundred forty million, seven hundred sixty-seven thousand, seven hundred sixty-nine".