40778037407 has 2 divisors, whose sum is σ = 40778037408. Its totient is φ = 40778037406.

The previous prime is 40778037401. The next prime is 40778037491. The reversal of 40778037407 is 70473087704.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40778037407 - 2¹² = 40778033311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40778037401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20389018703 + 20389018704.

It is an arithmetic number, because the mean of its divisors is an integer number (20389018704).

Almost surely, 2^40778037407 is an apocalyptic number.

40778037407 is a deficient number, since it is larger than the sum of its proper divisors (1).

40778037407 is an equidigital number, since it uses as much as digits as its factorization.

40778037407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921984, while the sum is 47.

The spelling of 40778037407 in words is "forty billion, seven hundred seventy-eight million, thirty-seven thousand, four hundred seven".