40871987941 has 2 divisors, whose sum is σ = 40871987942. Its totient is φ = 40871987940.

The previous prime is 40871987917. The next prime is 40871987953. The reversal of 40871987941 is 14978917804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34265712100 + 6606275841 = 185110^2 + 81279^2 .

It is a cyclic number.

It is not a de Polignac number, because 40871987941 - 2⁷ = 40871987813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40871987971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20435993970 + 20435993971.

It is an arithmetic number, because the mean of its divisors is an integer number (20435993971).

Almost surely, 2^40871987941 is an apocalyptic number.

It is an amenable number.

40871987941 is a deficient number, since it is larger than the sum of its proper divisors (1).

40871987941 is an equidigital number, since it uses as much as digits as its factorization.

40871987941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 40871987941 in words is "forty billion, eight hundred seventy-one million, nine hundred eighty-seven thousand, nine hundred forty-one".