9971734059661 has 16 divisors (see below), whose sum is σ = 11253499272000. Its totient is φ = 8752516819200.

The previous prime is 9971734059659. The next prime is 9971734059697. The reversal of 9971734059661 is 1669504371799.

It is not a de Polignac number, because 9971734059661 - 2¹ = 9971734059659 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 (9971734059601) 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, 43300741 + ... + 43530421.

It is an arithmetic number, because the mean of its divisors is an integer number (703343704500).

Almost surely, 2^{9971734059661} is an apocalyptic number.

It is an amenable number.

9971734059661 is a deficient number, since it is larger than the sum of its proper divisors (1281765212339).

9971734059661 is a wasteful number, since it uses less digits than its factorization.

9971734059661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365820.

The product of its (nonzero) digits is 77157360, while the sum is 67.

The spelling of 9971734059661 in words is "nine trillion, nine hundred seventy-one billion, seven hundred thirty-four million, fifty-nine thousand, six hundred sixty-one".