40205900742251 has 2 divisors, whose sum is σ = 40205900742252. Its totient is φ = 40205900742250.

The previous prime is 40205900742223. The next prime is 40205900742317. The reversal of 40205900742251 is 15224700950204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40205900742251 - 2²⁶ = 40205833633387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40205900742199 and 40205900742208.

It is not a weakly prime, because it can be changed into another prime (40205900712251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102950371125 + 20102950371126.

It is an arithmetic number, because the mean of its divisors is an integer number (20102950371126).

Almost surely, 2^{40205900742251} is an apocalyptic number.

40205900742251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40205900742251 is an equidigital number, since it uses as much as digits as its factorization.

40205900742251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 40205900742251 in words is "forty trillion, two hundred five billion, nine hundred million, seven hundred forty-two thousand, two hundred fifty-one".