9999998622 has 12 divisors (see below), whose sum is σ = 21666663720. Its totient is φ = 3333332868.

The previous prime is 9999998611. The next prime is 9999998633. The reversal of 9999998622 is 2268999999.

It is an interprime number because it is at equal distance from previous prime (9999998611) and next prime (9999998633).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277777722 + ... + 277777757.

It is an arithmetic number, because the mean of its divisors is an integer number (1805555310).

Almost surely, 2^9999998622 is an apocalyptic number.

9999998622 is an abundant number, since it is smaller than the sum of its proper divisors (11666665098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999998622 is a wasteful number, since it uses less digits than its factorization.

9999998622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555555487 (or 555555484 counting only the distinct ones).

The product of its digits is 102036672, while the sum is 72.

The square root of 9999998622 is about 99999.9931099998. The cubic root of 9999998622 is about 2154.4345910715.

The spelling of 9999998622 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, six hundred twenty-two".