40775557 has 2 divisors, whose sum is σ = 40775558. Its totient is φ = 40775556.

The previous prime is 40775543. The next prime is 40775561. The reversal of 40775557 is 75557704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21818241 + 18957316 = 4671^2 + 4354^2 .

It is a cyclic number.

It is not a de Polignac number, because 40775557 - 2¹⁹ = 40251269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40775507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20387778 + 20387779.

It is an arithmetic number, because the mean of its divisors is an integer number (20387779).

Almost surely, 2^40775557 is an apocalyptic number.

It is an amenable number.

40775557 is a deficient number, since it is larger than the sum of its proper divisors (1).

40775557 is an equidigital number, since it uses as much as digits as its factorization.

40775557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 171500, while the sum is 40.

The square root of 40775557 is about 6385.5741323706. The cubic root of 40775557 is about 344.1913624526.

The spelling of 40775557 in words is "forty million, seven hundred seventy-five thousand, five hundred fifty-seven".