9881422501729 has 9 divisors (see below), whose sum is σ = 9911075347537. Its totient is φ = 9851858138164.

The previous prime is 9881422501673. The next prime is 9881422501787. The reversal of 9881422501729 is 9271052241889.

The square root of 9881422501729 is 3143473.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 9881422501729 - 2⁹ = 9881422501217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9881422501799) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1090780602 + ... + 1090789660.

Almost surely, 2^{9881422501729} is an apocalyptic number.

9881422501729 is the 3143473-rd square number.

9881422501729 is the 1571737-th centered octagonal number.

It is an amenable number.

9881422501729 is a deficient number, since it is larger than the sum of its proper divisors (29652845808).

9881422501729 is an frugal number, since it uses more digits than its factorization.

9881422501729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18812 (or 9406 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 9881422501729 in words is "nine trillion, eight hundred eighty-one billion, four hundred twenty-two million, five hundred one thousand, seven hundred twenty-nine".