40398379751 has 2 divisors, whose sum is σ = 40398379752. Its totient is φ = 40398379750.

The previous prime is 40398379741. The next prime is 40398379843. The reversal of 40398379751 is 15797389304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40398379751 - 2¹⁴ = 40398363367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40398379741) 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, 20199189875 + 20199189876.

It is an arithmetic number, because the mean of its divisors is an integer number (20199189876).

Almost surely, 2^40398379751 is an apocalyptic number.

40398379751 is a deficient number, since it is larger than the sum of its proper divisors (1).

40398379751 is an equidigital number, since it uses as much as digits as its factorization.

40398379751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 40398379751 in words is "forty billion, three hundred ninety-eight million, three hundred seventy-nine thousand, seven hundred fifty-one".