981994096375 has 16 divisors (see below), whose sum is σ = 1245619275264. Its totient is φ = 772716660000.

The previous prime is 981994096373. The next prime is 981994096399. The reversal of 981994096375 is 573690499189.

It is not a de Polignac number, because 981994096375 - 2¹ = 981994096373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981994096373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64385431 + ... + 64400680.

It is an arithmetic number, because the mean of its divisors is an integer number (77851204704).

Almost surely, 2^981994096375 is an apocalyptic number.

981994096375 is a deficient number, since it is larger than the sum of its proper divisors (263625178889).

981994096375 is a wasteful number, since it uses less digits than its factorization.

981994096375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128786187 (or 128786177 counting only the distinct ones).

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

The spelling of 981994096375 in words is "nine hundred eighty-one billion, nine hundred ninety-four million, ninety-six thousand, three hundred seventy-five".