9907616421 has 12 divisors (see below), whose sum is σ = 14660050860. Its totient is φ = 6443977920.

The previous prime is 9907616419. The next prime is 9907616431. The reversal of 9907616421 is 1246167099.

9907616421 is a `hidden beast` number, since 9 + 9 + 0 + 7 + 616 + 4 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 670292100 + 9237324321 = 25890^2 + 96111^2 .

It is not a de Polignac number, because 9907616421 - 2¹ = 9907616419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9907616431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13424586 + ... + 13425323.

It is an arithmetic number, because the mean of its divisors is an integer number (1221670905).

Almost surely, 2^9907616421 is an apocalyptic number.

It is an amenable number.

9907616421 is a deficient number, since it is larger than the sum of its proper divisors (4752434439).

9907616421 is a wasteful number, since it uses less digits than its factorization.

9907616421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26849956 (or 26849953 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 9907616421 is about 99537.0103077242. The cubic root of 9907616421 is about 2147.7796743782.

The spelling of 9907616421 in words is "nine billion, nine hundred seven million, six hundred sixteen thousand, four hundred twenty-one".