998772647516 has 24 divisors (see below), whose sum is σ = 2046265914336. Its totient is φ = 417605287680.

The previous prime is 998772647479. The next prime is 998772647533. The reversal of 998772647516 is 615746277899.

It is a super-2 number, since 2×998772647516² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 998772647516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435004361 + ... + 435006656.

It is an arithmetic number, because the mean of its divisors is an integer number (85261079764).

Almost surely, 2^998772647516 is an apocalyptic number.

It is an amenable number.

998772647516 is an abundant number, since it is smaller than the sum of its proper divisors (1047493266820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998772647516 is a wasteful number, since it uses less digits than its factorization.

998772647516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870011069 (or 870011067 counting only the distinct ones).

The product of its digits is 320060160, while the sum is 71.

The spelling of 998772647516 in words is "nine hundred ninety-eight billion, seven hundred seventy-two million, six hundred forty-seven thousand, five hundred sixteen".