41000645781 has 24 divisors (see below), whose sum is σ = 62928515520. Its totient is φ = 25634964096.

The previous prime is 41000645761. The next prime is 41000645839. The reversal of 41000645781 is 18754600014.

It is a happy number.

41000645781 is a `hidden beast` number, since 4 + 1 + 0 + 0 + 0 + 645 + 7 + 8 + 1 = 666.

It is not a de Polignac number, because 41000645781 - 2¹⁰ = 41000644757 is a prime.

It is a super-2 number, since 2×41000645781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41000645761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 430161 + ... + 516758.

It is an arithmetic number, because the mean of its divisors is an integer number (2622021480).

Almost surely, 2^41000645781 is an apocalyptic number.

It is an amenable number.

41000645781 is a deficient number, since it is larger than the sum of its proper divisors (21927869739).

41000645781 is a wasteful number, since it uses less digits than its factorization.

41000645781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947225 (or 947222 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 41000645781 in words is "forty-one billion, six hundred forty-five thousand, seven hundred eighty-one".