9658706421 has 48 divisors (see below), whose sum is σ = 16102149504. Its totient is φ = 5041999872.

The previous prime is 9658706413. The next prime is 9658706441. The reversal of 9658706421 is 1246078569.

It is not a de Polignac number, because 9658706421 - 2³ = 9658706413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9658706401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 330225 + ... + 358281.

It is an arithmetic number, because the mean of its divisors is an integer number (335461448).

Almost surely, 2^9658706421 is an apocalyptic number.

9658706421 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9658706421 is a deficient number, since it is larger than the sum of its proper divisors (6443443083).

9658706421 is a wasteful number, since it uses less digits than its factorization.

9658706421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28190 (or 28177 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 9658706421 is about 98278.7180471947. The cubic root of 9658706421 is about 2129.6406206702.

The spelling of 9658706421 in words is "nine billion, six hundred fifty-eight million, seven hundred six thousand, four hundred twenty-one".