40254663121 has 4 divisors (see below), whose sum is σ = 40653224244. Its totient is φ = 39856102000.

The previous prime is 40254663083. The next prime is 40254663217. The reversal of 40254663121 is 12136645204.

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 18614782096 + 21639881025 = 136436^2 + 147105^2 .

It is a cyclic number.

It is not a de Polignac number, because 40254663121 - 2¹⁷ = 40254532049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40254633121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199280410 + ... + 199280611.

It is an arithmetic number, because the mean of its divisors is an integer number (10163306061).

Almost surely, 2^40254663121 is an apocalyptic number.

It is an amenable number.

40254663121 is a deficient number, since it is larger than the sum of its proper divisors (398561123).

40254663121 is a wasteful number, since it uses less digits than its factorization.

40254663121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398561122.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 40254663121 in words is "forty billion, two hundred fifty-four million, six hundred sixty-three thousand, one hundred twenty-one".