40046561321 has 16 divisors (see below), whose sum is σ = 43271398800. Its totient is φ = 36842557440.

The previous prime is 40046561311. The next prime is 40046561351. The reversal of 40046561321 is 12316564004.

It can be written as a sum of positive squares in 8 ways, for example, as 22921960000 + 17124601321 = 151400^2 + 130861^2 .

It is not a de Polignac number, because 40046561321 - 2³⁰ = 38972819497 is a prime.

It is a super-2 number, since 2×40046561321² (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 (40046561311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5231705 + ... + 5239353.

It is an arithmetic number, because the mean of its divisors is an integer number (2704462425).

Almost surely, 2^40046561321 is an apocalyptic number.

It is an amenable number.

40046561321 is a deficient number, since it is larger than the sum of its proper divisors (3224837479).

40046561321 is a wasteful number, since it uses less digits than its factorization.

40046561321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8956.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 40046561321 in words is "forty billion, forty-six million, five hundred sixty-one thousand, three hundred twenty-one".