999738845613 has 96 divisors (see below), whose sum is σ = 1660661533440. Its totient is φ = 575759923200.

The previous prime is 999738845587. The next prime is 999738845617. The reversal of 999738845613 is 316548837999.

999738845613 is a `hidden beast` number, since 9 + 9 + 97 + 3 + 88 + 456 + 1 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-999738845613 is a prime.

It is a super-2 number, since 2×999738845613² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999738845617) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16604263 + ... + 16664363.

It is an arithmetic number, because the mean of its divisors is an integer number (17298557640).

Almost surely, 2^999738845613 is an apocalyptic number.

It is an amenable number.

999738845613 is a deficient number, since it is larger than the sum of its proper divisors (660922687827).

999738845613 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (999738845612) it forms an eRAP, since the sums of their prime factors are consecutive (60338 and 60339).

With its predecessor (999738845612) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (60336).

999738845613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60339 (or 60336 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 72.

The spelling of 999738845613 in words is "nine hundred ninety-nine billion, seven hundred thirty-eight million, eight hundred forty-five thousand, six hundred thirteen".