109958396985 has 12 divisors (see below), whose sum is σ = 190594554852. Its totient is φ = 58644478368.

The previous prime is 109958396981. The next prime is 109958397047. The reversal of 109958396985 is 589693859901.

109958396985 is a `hidden beast` number, since 10 + 99 + 58 + 396 + 98 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47572844544 + 62385552441 = 218112^2 + 249771^2 .

It is not a de Polignac number, because 109958396985 - 2² = 109958396981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109958396981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221759922 + ... + 1221760011.

It is an arithmetic number, because the mean of its divisors is an integer number (15882879571).

Almost surely, 2^109958396985 is an apocalyptic number.

109958396985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109958396985 is a deficient number, since it is larger than the sum of its proper divisors (80636157867).

109958396985 is a wasteful number, since it uses less digits than its factorization.

109958396985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443519944 (or 2443519941 counting only the distinct ones).

The product of its (nonzero) digits is 188956800, while the sum is 72.

The spelling of 109958396985 in words is "one hundred nine billion, nine hundred fifty-eight million, three hundred ninety-six thousand, nine hundred eighty-five".