40141890661 has 2 divisors, whose sum is σ = 40141890662. Its totient is φ = 40141890660.

The previous prime is 40141890647. The next prime is 40141890727. The reversal of 40141890661 is 16609814104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35154000036 + 4987890625 = 187494^2 + 70625^2 .

It is a cyclic number.

It is not a de Polignac number, because 40141890661 - 2⁵ = 40141890629 is a prime.

It is a super-2 number, since 2×40141890661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40141890361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20070945330 + 20070945331.

It is an arithmetic number, because the mean of its divisors is an integer number (20070945331).

Almost surely, 2^40141890661 is an apocalyptic number.

It is an amenable number.

40141890661 is a deficient number, since it is larger than the sum of its proper divisors (1).

40141890661 is an equidigital number, since it uses as much as digits as its factorization.

40141890661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 40141890661 in words is "forty billion, one hundred forty-one million, eight hundred ninety thousand, six hundred sixty-one".