40504951645 has 8 divisors (see below), whose sum is σ = 48607301304. Its totient is φ = 32403055104.

The previous prime is 40504951589. The next prime is 40504951657. The reversal of 40504951645 is 54615940504.

It can be written as a sum of positive squares in 4 ways, for example, as 4047249924 + 36457701721 = 63618^2 + 190939^2 .

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-40504951645 is a prime.

It is a super-2 number, since 2×40504951645² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 131457 + ... + 313513.

It is an arithmetic number, because the mean of its divisors is an integer number (6075912663).

Almost surely, 2^40504951645 is an apocalyptic number.

It is an amenable number.

40504951645 is a deficient number, since it is larger than the sum of its proper divisors (8102349659).

40504951645 is a wasteful number, since it uses less digits than its factorization.

40504951645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226559.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 40504951645 in words is "forty billion, five hundred four million, nine hundred fifty-one thousand, six hundred forty-five".