40871768437 has 2 divisors, whose sum is σ = 40871768438. Its totient is φ = 40871768436.

The previous prime is 40871768423. The next prime is 40871768461. The reversal of 40871768437 is 73486717804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40363220836 + 508547601 = 200906^2 + 22551^2 .

It is a cyclic number.

It is not a de Polignac number, because 40871768437 - 2³¹ = 38724284789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40871768137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20435884218 + 20435884219.

It is an arithmetic number, because the mean of its divisors is an integer number (20435884219).

Almost surely, 2^40871768437 is an apocalyptic number.

It is an amenable number.

40871768437 is a deficient number, since it is larger than the sum of its proper divisors (1).

40871768437 is an equidigital number, since it uses as much as digits as its factorization.

40871768437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6322176, while the sum is 55.

The spelling of 40871768437 in words is "forty billion, eight hundred seventy-one million, seven hundred sixty-eight thousand, four hundred thirty-seven".