998953261972 has 24 divisors (see below), whose sum is σ = 1753100344800. Its totient is φ = 498069434016.

The previous prime is 998953261951. The next prime is 998953262009. The reversal of 998953261972 is 279162359899.

It is a super-2 number, since 2×998953261972² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1771554 + ... + 2266342.

It is an arithmetic number, because the mean of its divisors is an integer number (73045847700).

Almost surely, 2^998953261972 is an apocalyptic number.

It is an amenable number.

998953261972 is a deficient number, since it is larger than the sum of its proper divisors (754147082828).

998953261972 is a wasteful number, since it uses less digits than its factorization.

998953261972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496215 (or 496213 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 70.

The spelling of 998953261972 in words is "nine hundred ninety-eight billion, nine hundred fifty-three million, two hundred sixty-one thousand, nine hundred seventy-two".