40479123761 has 2 divisors, whose sum is σ = 40479123762. Its totient is φ = 40479123760.

The previous prime is 40479123739. The next prime is 40479123767. The reversal of 40479123761 is 16732197404.

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., 40246378225 + 232745536 = 200615^2 + 15256^2 .

It is a cyclic number.

It is not a de Polignac number, because 40479123761 - 2¹⁴ = 40479107377 is a prime.

It is not a weakly prime, because it can be changed into another prime (40479123767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20239561880 + 20239561881.

It is an arithmetic number, because the mean of its divisors is an integer number (20239561881).

Almost surely, 2^40479123761 is an apocalyptic number.

It is an amenable number.

40479123761 is a deficient number, since it is larger than the sum of its proper divisors (1).

40479123761 is an equidigital number, since it uses as much as digits as its factorization.

40479123761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 40479123761 in words is "forty billion, four hundred seventy-nine million, one hundred twenty-three thousand, seven hundred sixty-one".