40709888251 has 2 divisors, whose sum is σ = 40709888252. Its totient is φ = 40709888250.

The previous prime is 40709888201. The next prime is 40709888257. The reversal of 40709888251 is 15288890704.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40709888251 - 2⁷ = 40709888123 is a prime.

It is not a weakly prime, because it can be changed into another prime (40709888257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20354944125 + 20354944126.

It is an arithmetic number, because the mean of its divisors is an integer number (20354944126).

Almost surely, 2^40709888251 is an apocalyptic number.

40709888251 is a deficient number, since it is larger than the sum of its proper divisors (1).

40709888251 is an equidigital number, since it uses as much as digits as its factorization.

40709888251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 52.

The spelling of 40709888251 in words is "forty billion, seven hundred nine million, eight hundred eighty-eight thousand, two hundred fifty-one".