40120431230461 has 2 divisors, whose sum is σ = 40120431230462. Its totient is φ = 40120431230460.

The previous prime is 40120431230311. The next prime is 40120431230479. The reversal of 40120431230461 is 16403213402104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33378281431236 + 6742149799225 = 5777394^2 + 2596565^2 .

It is a cyclic number.

It is not a de Polignac number, because 40120431230461 - 2¹⁹ = 40120430706173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40120431233461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060215615230 + 20060215615231.

It is an arithmetic number, because the mean of its divisors is an integer number (20060215615231).

Almost surely, 2^{40120431230461} is an apocalyptic number.

It is an amenable number.

40120431230461 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120431230461 is an equidigital number, since it uses as much as digits as its factorization.

40120431230461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 40120431230461 its reverse (16403213402104), we get a palindrome (56523644632565).

The spelling of 40120431230461 in words is "forty trillion, one hundred twenty billion, four hundred thirty-one million, two hundred thirty thousand, four hundred sixty-one".