9922987645 has 8 divisors (see below), whose sum is σ = 11908642104. Its totient is φ = 7937685504.

The previous prime is 9922987643. The next prime is 9922987661. The reversal of 9922987645 is 5467892299.

It can be written as a sum of positive squares in 4 ways, for example, as 1064977956 + 8858009689 = 32634^2 + 94117^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9922987645 - 2¹ = 9922987643 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 (9922987643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21544 + ... + 142513.

It is an arithmetic number, because the mean of its divisors is an integer number (1488580263).

Almost surely, 2^9922987645 is an apocalyptic number.

It is an amenable number.

9922987645 is a deficient number, since it is larger than the sum of its proper divisors (1985654459).

9922987645 is a wasteful number, since it uses less digits than its factorization.

9922987645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176159.

The product of its digits is 19595520, while the sum is 61.

The square root of 9922987645 is about 99614.1939936272. The cubic root of 9922987645 is about 2148.8898285104.

The spelling of 9922987645 in words is "nine billion, nine hundred twenty-two million, nine hundred eighty-seven thousand, six hundred forty-five".