40972844789 has 2 divisors, whose sum is σ = 40972844790. Its totient is φ = 40972844788.

The previous prime is 40972844767. The next prime is 40972844807. The reversal of 40972844789 is 98744827904.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40905062500 + 67782289 = 202250^2 + 8233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40972844789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40972744789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20486422394 + 20486422395.

It is an arithmetic number, because the mean of its divisors is an integer number (20486422395).

Almost surely, 2^40972844789 is an apocalyptic number.

It is an amenable number.

40972844789 is a deficient number, since it is larger than the sum of its proper divisors (1).

40972844789 is an equidigital number, since it uses as much as digits as its factorization.

40972844789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32514048, while the sum is 62.

The spelling of 40972844789 in words is "forty billion, nine hundred seventy-two million, eight hundred forty-four thousand, seven hundred eighty-nine".