98506737521 has 4 divisors (see below), whose sum is σ = 98747585700. Its totient is φ = 98265889344.

The previous prime is 98506737503. The next prime is 98506737547. The reversal of 98506737521 is 12573760589.

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 95366704225 + 3140033296 = 308815^2 + 56036^2 .

It is a cyclic number.

It is not a de Polignac number, because 98506737521 - 2³⁰ = 97432995697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98506767521) 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, 120423476 + ... + 120424293.

It is an arithmetic number, because the mean of its divisors is an integer number (24686896425).

Almost surely, 2^98506737521 is an apocalyptic number.

It is an amenable number.

98506737521 is a deficient number, since it is larger than the sum of its proper divisors (240848179).

98506737521 is a wasteful number, since it uses less digits than its factorization.

98506737521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240848178.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 98506737521 in words is "ninety-eight billion, five hundred six million, seven hundred thirty-seven thousand, five hundred twenty-one".