40371428161 has 2 divisors, whose sum is σ = 40371428162. Its totient is φ = 40371428160.

The previous prime is 40371428117. The next prime is 40371428173. The reversal of 40371428161 is 16182417304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40352774400 + 18653761 = 200880^2 + 4319^2 .

It is a cyclic number.

It is not a de Polignac number, because 40371428161 - 2¹⁹ = 40370903873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40371428161.

It is not a weakly prime, because it can be changed into another prime (40371420161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20185714080 + 20185714081.

It is an arithmetic number, because the mean of its divisors is an integer number (20185714081).

Almost surely, 2^40371428161 is an apocalyptic number.

It is an amenable number.

40371428161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40371428161 is an equidigital number, since it uses as much as digits as its factorization.

40371428161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 40371428161 in words is "forty billion, three hundred seventy-one million, four hundred twenty-eight thousand, one hundred sixty-one".