40961909521 has 8 divisors (see below), whose sum is σ = 45138705920. Its totient is φ = 36931667472.

The previous prime is 40961909419. The next prime is 40961909533. The reversal of 40961909521 is 12590916904.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40961909521 - 2³¹ = 38814425873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40961909621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36638001 + ... + 36639118.

It is an arithmetic number, because the mean of its divisors is an integer number (5642338240).

Almost surely, 2^40961909521 is an apocalyptic number.

It is an amenable number.

40961909521 is a deficient number, since it is larger than the sum of its proper divisors (4176796399).

40961909521 is a wasteful number, since it uses less digits than its factorization.

40961909521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73277175.

The product of its (nonzero) digits is 174960, while the sum is 46.

The spelling of 40961909521 in words is "forty billion, nine hundred sixty-one million, nine hundred nine thousand, five hundred twenty-one".