40146887861 has 2 divisors, whose sum is σ = 40146887862. Its totient is φ = 40146887860.

The previous prime is 40146887857. The next prime is 40146887917. The reversal of 40146887861 is 16878864104.

40146887861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35884103761 + 4262784100 = 189431^2 + 65290^2 .

It is a cyclic number.

It is not a de Polignac number, because 40146887861 - 2² = 40146887857 is a prime.

It is a super-2 number, since 2×40146887861² (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 (40146887821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20073443930 + 20073443931.

It is an arithmetic number, because the mean of its divisors is an integer number (20073443931).

Almost surely, 2^40146887861 is an apocalyptic number.

It is an amenable number.

40146887861 is a deficient number, since it is larger than the sum of its proper divisors (1).

40146887861 is an equidigital number, since it uses as much as digits as its factorization.

40146887861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 40146887861 in words is "forty billion, one hundred forty-six million, eight hundred eighty-seven thousand, eight hundred sixty-one".