41091645 has 48 divisors (see below), whose sum is σ = 78599808. Its totient is φ = 18264960.

The previous prime is 41091641. The next prime is 41091649. The reversal of 41091645 is 54619014.

It is a happy number.

41091645 is a nontrivial binomial coefficient, being equal to C(9066, 2).

It is an interprime number because it is at equal distance from previous prime (41091641) and next prime (41091649).

It is not a de Polignac number, because 41091645 - 2² = 41091641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41091641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26440 + ... + 27950.

It is an arithmetic number, because the mean of its divisors is an integer number (1637496).

Almost surely, 2^41091645 is an apocalyptic number.

41091645 is the 9065-th triangular number and also the 4533-rd hexagonal number.

It is an amenable number.

41091645 is a deficient number, since it is larger than the sum of its proper divisors (37508163).

41091645 is a wasteful number, since it uses less digits than its factorization.

41091645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 41091645 is about 6410.2765150967. The cubic root of 41091645 is about 345.0784530679.

The spelling of 41091645 in words is "forty-one million, ninety-one thousand, six hundred forty-five".