9724898557 has 16 divisors (see below), whose sum is σ = 10698475392. Its totient is φ = 8766385920.

The previous prime is 9724898543. The next prime is 9724898683. The reversal of 9724898557 is 7558984279.

It is a cyclic number.

It is not a de Polignac number, because 9724898557 - 2⁷ = 9724898429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9724898857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1553608 + ... + 1559854.

It is an arithmetic number, because the mean of its divisors is an integer number (668654712).

Almost surely, 2^9724898557 is an apocalyptic number.

It is an amenable number.

9724898557 is a deficient number, since it is larger than the sum of its proper divisors (973576835).

9724898557 is a wasteful number, since it uses less digits than its factorization.

9724898557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428.

The product of its digits is 50803200, while the sum is 64.

The square root of 9724898557 is about 98614.9002788118. The cubic root of 9724898557 is about 2134.4944336906.

The spelling of 9724898557 in words is "nine billion, seven hundred twenty-four million, eight hundred ninety-eight thousand, five hundred fifty-seven".