40253654381 has 2 divisors, whose sum is σ = 40253654382. Its totient is φ = 40253654380.

The previous prime is 40253654351. The next prime is 40253654417. The reversal of 40253654381 is 18345635204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30071028100 + 10182626281 = 173410^2 + 100909^2 .

It is a cyclic number.

It is not a de Polignac number, because 40253654381 - 2⁶ = 40253654317 is a prime.

It is a super-2 number, since 2×40253654381² (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 (40253654341) 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, 20126827190 + 20126827191.

It is an arithmetic number, because the mean of its divisors is an integer number (20126827191).

Almost surely, 2^40253654381 is an apocalyptic number.

It is an amenable number.

40253654381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40253654381 is an equidigital number, since it uses as much as digits as its factorization.

40253654381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 40253654381 in words is "forty billion, two hundred fifty-three million, six hundred fifty-four thousand, three hundred eighty-one".