40256254189 has 2 divisors, whose sum is σ = 40256254190. Its totient is φ = 40256254188.

The previous prime is 40256254177. The next prime is 40256254211. The reversal of 40256254189 is 98145265204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33385502089 + 6870752100 = 182717^2 + 82890^2 .

It is a cyclic number.

It is not a de Polignac number, because 40256254189 - 2¹⁹ = 40255729901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40256254289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20128127094 + 20128127095.

It is an arithmetic number, because the mean of its divisors is an integer number (20128127095).

Almost surely, 2^40256254189 is an apocalyptic number.

It is an amenable number.

40256254189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40256254189 is an equidigital number, since it uses as much as digits as its factorization.

40256254189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 40256254189 in words is "forty billion, two hundred fifty-six million, two hundred fifty-four thousand, one hundred eighty-nine".