89920550501 has 4 divisors (see below), whose sum is σ = 89921162604. Its totient is φ = 89919938400.

The previous prime is 89920550491. The next prime is 89920550521. The reversal of 89920550501 is 10505502998.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 64427638276 + 25492912225 = 253826^2 + 159665^2 .

It is a cyclic number.

It is not a de Polignac number, because 89920550501 - 2¹⁸ = 89920288357 is a prime.

It is a deceptive number, since it divides R_89920550500.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89920550521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61211 + ... + 428471.

It is an arithmetic number, because the mean of its divisors is an integer number (22480290651).

Almost surely, 2^89920550501 is an apocalyptic number.

89920550501 is the 244841-st pentagonal number.

It is an amenable number.

89920550501 is a deficient number, since it is larger than the sum of its proper divisors (612103).

89920550501 is a wasteful number, since it uses less digits than its factorization.

89920550501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612102.

The product of its (nonzero) digits is 162000, while the sum is 44.

The spelling of 89920550501 in words is "eighty-nine billion, nine hundred twenty million, five hundred fifty thousand, five hundred one".