40308751309 has 2 divisors, whose sum is σ = 40308751310. Its totient is φ = 40308751308.

The previous prime is 40308751283. The next prime is 40308751319. The reversal of 40308751309 is 90315780304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36348566409 + 3960184900 = 190653^2 + 62930^2 .

It is a cyclic number.

It is not a de Polignac number, because 40308751309 - 2⁷ = 40308751181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40308751319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20154375654 + 20154375655.

It is an arithmetic number, because the mean of its divisors is an integer number (20154375655).

Almost surely, 2^40308751309 is an apocalyptic number.

It is an amenable number.

40308751309 is a deficient number, since it is larger than the sum of its proper divisors (1).

40308751309 is an equidigital number, since it uses as much as digits as its factorization.

40308751309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 40308751309 in words is "forty billion, three hundred eight million, seven hundred fifty-one thousand, three hundred nine".