40153543021 has 4 divisors (see below), whose sum is σ = 40240644444. Its totient is φ = 40066441600.

The previous prime is 40153542977. The next prime is 40153543039. The reversal of 40153543021 is 12034535104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10082168100 + 30071374921 = 100410^2 + 173411^2 .

It is a cyclic number.

It is not a de Polignac number, because 40153543021 - 2¹⁹ = 40153018733 is a prime.

It is a super-2 number, since 2×40153543021² (a number of 22 digits) 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 (40153543721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43550020 + ... + 43550941.

It is an arithmetic number, because the mean of its divisors is an integer number (10060161111).

Almost surely, 2^40153543021 is an apocalyptic number.

It is an amenable number.

40153543021 is a deficient number, since it is larger than the sum of its proper divisors (87101423).

40153543021 is an equidigital number, since it uses as much as digits as its factorization.

40153543021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87101422.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 40153543021 in words is "forty billion, one hundred fifty-three million, five hundred forty-three thousand, twenty-one".