9978417916 has 6 divisors (see below), whose sum is σ = 17462231360. Its totient is φ = 4989208956.

The previous prime is 9978417913. The next prime is 9978417923. The reversal of 9978417916 is 6197148799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978417913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247302236 + ... + 1247302243.

Almost surely, 2^9978417916 is an apocalyptic number.

It is an amenable number.

9978417916 is a deficient number, since it is larger than the sum of its proper divisors (7483813444).

9978417916 is a wasteful number, since it uses less digits than its factorization.

9978417916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494604483 (or 2494604481 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 61.

The square root of 9978417916 is about 99892.0312937924. The cubic root of 9978417916 is about 2152.8836673377.

The spelling of 9978417916 in words is "nine billion, nine hundred seventy-eight million, four hundred seventeen thousand, nine hundred sixteen".