40771645 has 4 divisors (see below), whose sum is σ = 48925980. Its totient is φ = 32617312.

The previous prime is 40771639. The next prime is 40771667. The reversal of 40771645 is 54617704.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21031396 + 19740249 = 4586^2 + 4443^2 .

It is a cyclic number.

It is not a de Polignac number, because 40771645 - 2³ = 40771637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40771645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4077160 + ... + 4077169.

It is an arithmetic number, because the mean of its divisors is an integer number (12231495).

Almost surely, 2^40771645 is an apocalyptic number.

It is an amenable number.

40771645 is a deficient number, since it is larger than the sum of its proper divisors (8154335).

40771645 is an equidigital number, since it uses as much as digits as its factorization.

40771645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8154334.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 40771645 is about 6385.2678095754. The cubic root of 40771645 is about 344.1803548803.

The spelling of 40771645 in words is "forty million, seven hundred seventy-one thousand, six hundred forty-five".