40626454391 has 2 divisors, whose sum is σ = 40626454392. Its totient is φ = 40626454390.

The previous prime is 40626454387. The next prime is 40626454439. The reversal of 40626454391 is 19345462604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40626454391 - 2² = 40626454387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40626454381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20313227195 + 20313227196.

It is an arithmetic number, because the mean of its divisors is an integer number (20313227196).

Almost surely, 2^40626454391 is an apocalyptic number.

40626454391 is a deficient number, since it is larger than the sum of its proper divisors (1).

40626454391 is an equidigital number, since it uses as much as digits as its factorization.

40626454391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 40626454391 in words is "forty billion, six hundred twenty-six million, four hundred fifty-four thousand, three hundred ninety-one".