40770581 has 2 divisors, whose sum is σ = 40770582. Its totient is φ = 40770580.

The previous prime is 40770563. The next prime is 40770589. The reversal of 40770581 is 18507704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 10023556 = 5545^2 + 3166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40770581 is a prime.

It is a super-2 number, since 2×40770581² = 3324480550155122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40770589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20385290 + 20385291.

It is an arithmetic number, because the mean of its divisors is an integer number (20385291).

Almost surely, 2^40770581 is an apocalyptic number.

It is an amenable number.

40770581 is a deficient number, since it is larger than the sum of its proper divisors (1).

40770581 is an equidigital number, since it uses as much as digits as its factorization.

40770581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 40770581 is about 6385.1844922445. The cubic root of 40770581 is about 344.1773608790.

The spelling of 40770581 in words is "forty million, seven hundred seventy thousand, five hundred eighty-one".