6985138525500 has 144 divisors (see below), whose sum is σ = 21607620993504. Its totient is φ = 1753132697600.

The previous prime is 6985138525427. The next prime is 6985138525559. The reversal of 6985138525500 is 55258315896.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7623177 + ... + 8490176.

It is an arithmetic number, because the mean of its divisors is an integer number (150052923566).

Almost surely, 2^{6985138525500} is an apocalyptic number.

6985138525500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6985138525500 is an abundant number, since it is smaller than the sum of its proper divisors (14622482468004).

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

6985138525500 is a wasteful number, since it uses less digits than its factorization.

6985138525500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16113409 (or 16113380 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 57.

The spelling of 6985138525500 in words is "six trillion, nine hundred eighty-five billion, one hundred thirty-eight million, five hundred twenty-five thousand, five hundred".