40326434821 has 8 divisors (see below), whose sum is σ = 41315261400. Its totient is φ = 39337858560.

The previous prime is 40326434789. The next prime is 40326434857. The reversal of 40326434821 is 12843462304.

It can be written as a sum of positive squares in 4 ways, for example, as 1979004196 + 38347430625 = 44486^2 + 195825^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40326434821 - 2⁵ = 40326434789 is a prime.

It is a super-2 number, since 2×40326434821² (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 (40326434321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287245 + ... + 403933.

It is an arithmetic number, because the mean of its divisors is an integer number (5164407675).

Almost surely, 2^40326434821 is an apocalyptic number.

40326434821 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40326434821 is a deficient number, since it is larger than the sum of its proper divisors (988826579).

40326434821 is a wasteful number, since it uses less digits than its factorization.

40326434821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125159.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 40326434821 in words is "forty billion, three hundred twenty-six million, four hundred thirty-four thousand, eight hundred twenty-one".