40556771 has 2 divisors, whose sum is σ = 40556772. Its totient is φ = 40556770.

The previous prime is 40556759. The next prime is 40556779. The reversal of 40556771 is 17765504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40556771 - 2⁶ = 40556707 is a prime.

It is equal to p_2465477 and since 40556771 and 2465477 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40556779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20278385 + 20278386.

It is an arithmetic number, because the mean of its divisors is an integer number (20278386).

Almost surely, 2^40556771 is an apocalyptic number.

40556771 is a deficient number, since it is larger than the sum of its proper divisors (1).

40556771 is an equidigital number, since it uses as much as digits as its factorization.

40556771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 40556771 is about 6368.4198197041. The cubic root of 40556771 is about 343.5746585212.

The spelling of 40556771 in words is "forty million, five hundred fifty-six thousand, seven hundred seventy-one".