40134745421 has 2 divisors, whose sum is σ = 40134745422. Its totient is φ = 40134745420.

The previous prime is 40134745369. The next prime is 40134745481. The reversal of 40134745421 is 12454743104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28429669321 + 11705076100 = 168611^2 + 108190^2 .

It is a cyclic number.

It is not a de Polignac number, because 40134745421 - 2³⁴ = 22954876237 is a prime.

It is a super-2 number, since 2×40134745421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40134745481) 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 as a sum of consecutive naturals, namely, 20067372710 + 20067372711.

It is an arithmetic number, because the mean of its divisors is an integer number (20067372711).

Almost surely, 2^40134745421 is an apocalyptic number.

It is an amenable number.

40134745421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40134745421 is an equidigital number, since it uses as much as digits as its factorization.

40134745421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 35.

The spelling of 40134745421 in words is "forty billion, one hundred thirty-four million, seven hundred forty-five thousand, four hundred twenty-one".