41953321621 has 4 divisors (see below), whose sum is σ = 44161391200. Its totient is φ = 39745252044.

The previous prime is 41953321607. The next prime is 41953321639. The reversal of 41953321621 is 12612335914.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 41953321621 - 2¹³ = 41953313429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41953321121) 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 3 ways as a sum of consecutive naturals, for example, 1104034761 + ... + 1104034798.

It is an arithmetic number, because the mean of its divisors is an integer number (11040347800).

Almost surely, 2^41953321621 is an apocalyptic number.

It is an amenable number.

41953321621 is a deficient number, since it is larger than the sum of its proper divisors (2208069579).

41953321621 is a wasteful number, since it uses less digits than its factorization.

41953321621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208069578.

The product of its digits is 38880, while the sum is 37.

The spelling of 41953321621 in words is "forty-one billion, nine hundred fifty-three million, three hundred twenty-one thousand, six hundred twenty-one".