73951603568641 has 4 divisors (see below), whose sum is σ = 73951934492884. Its totient is φ = 73951272644400.

The previous prime is 73951603568611. The next prime is 73951603568653. The reversal of 73951603568641 is 14686530615937.

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 63465042585025 + 10486560983616 = 7966495^2 + 3238296^2 .

It is a cyclic number.

It is not a de Polignac number, because 73951603568641 - 2¹³ = 73951603560449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73951603568611) 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, 165126690 + ... + 165573931.

It is an arithmetic number, because the mean of its divisors is an integer number (18487983623221).

Almost surely, 2^{73951603568641} is an apocalyptic number.

It is an amenable number.

73951603568641 is a deficient number, since it is larger than the sum of its proper divisors (330924243).

73951603568641 is a wasteful number, since it uses less digits than its factorization.

73951603568641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330924242.

The product of its (nonzero) digits is 97977600, while the sum is 64.

The spelling of 73951603568641 in words is "seventy-three trillion, nine hundred fifty-one billion, six hundred three million, five hundred sixty-eight thousand, six hundred forty-one".