40145331769 has 3 divisors (see below), whose sum is σ = 40145532133. Its totient is φ = 40145131406.

The previous prime is 40145331767. The next prime is 40145331817. The reversal of 40145331769 is 96713354104.

The square root of 40145331769 is 200363.

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 is not a de Polignac number, because 40145331769 - 2¹ = 40145331767 is a prime.

It is a super-2 number, since 2×40145331769² (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 (40145331767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 100182 + ... + 300544.

Almost surely, 2^40145331769 is an apocalyptic number.

40145331769 is the 200363-rd square number.

40145331769 is the 100182-nd centered octagonal number.

It is an amenable number.

40145331769 is a deficient number, since it is larger than the sum of its proper divisors (200364).

40145331769 is an frugal number, since it uses more digits than its factorization.

40145331769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400726 (or 200363 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 40145331769 in words is "forty billion, one hundred forty-five million, three hundred thirty-one thousand, seven hundred sixty-nine".