9999615412 has 48 divisors (see below), whose sum is σ = 18954053440. Its totient is φ = 4599908352.

The previous prime is 9999615403. The next prime is 9999615421. The reversal of 9999615412 is 2145169999.

It is an interprime number because it is at equal distance from previous prime (9999615403) and next prime (9999615421).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1619443 + ... + 1625605.

Almost surely, 2^9999615412 is an apocalyptic number.

It is an amenable number.

9999615412 is a deficient number, since it is larger than the sum of its proper divisors (8954438028).

9999615412 is a wasteful number, since it uses less digits than its factorization.

9999615412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6800 (or 6798 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 55.

The square root of 9999615412 is about 99998.0770415112. The cubic root of 9999615412 is about 2154.4070706869.

The spelling of 9999615412 in words is "nine billion, nine hundred ninety-nine million, six hundred fifteen thousand, four hundred twelve".