41801998649 has 4 divisors (see below), whose sum is σ = 44260939764. Its totient is φ = 39343057536.

The previous prime is 41801998627. The next prime is 41801998673. The reversal of 41801998649 is 94689910814.

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 32966938624 + 8835060025 = 181568^2 + 93995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41801998649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (41801998349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229470532 + ... + 1229470565.

It is an arithmetic number, because the mean of its divisors is an integer number (11065234941).

Almost surely, 2^41801998649 is an apocalyptic number.

It is an amenable number.

41801998649 is a deficient number, since it is larger than the sum of its proper divisors (2458941115).

41801998649 is a wasteful number, since it uses less digits than its factorization.

41801998649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458941114.

The product of its (nonzero) digits is 4478976, while the sum is 59.

The spelling of 41801998649 in words is "forty-one billion, eight hundred one million, nine hundred ninety-eight thousand, six hundred forty-nine".