45775781 has 8 divisors (see below), whose sum is σ = 48673944. Its totient is φ = 42900480.

The previous prime is 45775711. The next prime is 45775783. The reversal of 45775781 is 18757754.

It can be written as a sum of positive squares in 4 ways, for example, as 17056900 + 28718881 = 4130^2 + 5359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45775781 is a prime.

It is a super-2 number, since 2×45775781² = 4190844252319922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45775783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490 + ... + 9683.

It is an arithmetic number, because the mean of its divisors is an integer number (6084243).

Almost surely, 2^45775781 is an apocalyptic number.

It is an amenable number.

45775781 is a deficient number, since it is larger than the sum of its proper divisors (2898163).

45775781 is a wasteful number, since it uses less digits than its factorization.

45775781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11431.

The product of its digits is 274400, while the sum is 44.

The square root of 45775781 is about 6765.7801471818. The cubic root of 45775781 is about 357.7216738545.

The spelling of 45775781 in words is "forty-five million, seven hundred seventy-five thousand, seven hundred eighty-one".