40205264251 has 2 divisors, whose sum is σ = 40205264252. Its totient is φ = 40205264250.

The previous prime is 40205264243. The next prime is 40205264261. The reversal of 40205264251 is 15246250204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40205264251 - 2³ = 40205264243 is a prime.

It is not a weakly prime, because it can be changed into another prime (40205264261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102632125 + 20102632126.

It is an arithmetic number, because the mean of its divisors is an integer number (20102632126).

Almost surely, 2^40205264251 is an apocalyptic number.

40205264251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40205264251 is an equidigital number, since it uses as much as digits as its factorization.

40205264251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 40205264251 in words is "forty billion, two hundred five million, two hundred sixty-four thousand, two hundred fifty-one".