40501452421 has 2 divisors, whose sum is σ = 40501452422. Its totient is φ = 40501452420.

The previous prime is 40501452377. The next prime is 40501452469. The reversal of 40501452421 is 12425410504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21155702500 + 19345749921 = 145450^2 + 139089^2 .

It is a cyclic number.

It is not a de Polignac number, because 40501452421 - 2⁹ = 40501451909 is a prime.

It is a super-2 number, since 2×40501452421² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40501452421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40501482421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20250726210 + 20250726211.

It is an arithmetic number, because the mean of its divisors is an integer number (20250726211).

Almost surely, 2^40501452421 is an apocalyptic number.

It is an amenable number.

40501452421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40501452421 is an equidigital number, since it uses as much as digits as its factorization.

40501452421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 40501452421 its reverse (12425410504), we get a palindrome (52926862925).

The spelling of 40501452421 in words is "forty billion, five hundred one million, four hundred fifty-two thousand, four hundred twenty-one".