40511657 has 2 divisors, whose sum is σ = 40511658. Its totient is φ = 40511656.

The previous prime is 40511641. The next prime is 40511687. The reversal of 40511657 is 75611504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23775376 + 16736281 = 4876^2 + 4091^2 .

It is a cyclic number.

It is not a de Polignac number, because 40511657 - 2⁴ = 40511641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40511687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20255828 + 20255829.

It is an arithmetic number, because the mean of its divisors is an integer number (20255829).

Almost surely, 2^40511657 is an apocalyptic number.

It is an amenable number.

40511657 is a deficient number, since it is larger than the sum of its proper divisors (1).

40511657 is an equidigital number, since it uses as much as digits as its factorization.

40511657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 40511657 is about 6364.8768252025. The cubic root of 40511657 is about 343.4472175904.

The spelling of 40511657 in words is "forty million, five hundred eleven thousand, six hundred fifty-seven".