9983970621090 has 32 divisors (see below), whose sum is σ = 26623921656960. Its totient is φ = 2662392165552.

The previous prime is 9983970621061. The next prime is 9983970621091. The reversal of 9983970621090 is 901260793899.

It is a happy number.

9983970621090 is a `hidden beast` number, since 9 + 98 + 397 + 0 + 62 + 10 + 90 = 666.

It is not an unprimeable number, because it can be changed into a prime (9983970621091) 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, 18488834214 + ... + 18488834753.

It is an arithmetic number, because the mean of its divisors is an integer number (831997551780).

Almost surely, 2^{9983970621090} is an apocalyptic number.

9983970621090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9983970621090 is an abundant number, since it is smaller than the sum of its proper divisors (16639951035870).

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

9983970621090 is a wasteful number, since it uses less digits than its factorization.

9983970621090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36977668983 (or 36977668977 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 9983970621090 in words is "nine trillion, nine hundred eighty-three billion, nine hundred seventy million, six hundred twenty-one thousand, ninety".