40637525161 has 2 divisors, whose sum is σ = 40637525162. Its totient is φ = 40637525160.

The previous prime is 40637525153. The next prime is 40637525189. The reversal of 40637525161 is 16152573604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31429971225 + 9207553936 = 177285^2 + 95956^2 .

It is a cyclic number.

It is not a de Polignac number, because 40637525161 - 2³ = 40637525153 is a prime.

It is not a weakly prime, because it can be changed into another prime (40637525141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20318762580 + 20318762581.

It is an arithmetic number, because the mean of its divisors is an integer number (20318762581).

Almost surely, 2^40637525161 is an apocalyptic number.

It is an amenable number.

40637525161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40637525161 is an equidigital number, since it uses as much as digits as its factorization.

40637525161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 40637525161 in words is "forty billion, six hundred thirty-seven million, five hundred twenty-five thousand, one hundred sixty-one".