981694450371 has 16 divisors (see below), whose sum is σ = 1340263431936. Its totient is φ = 638814612576.

The previous prime is 981694450357. The next prime is 981694450379. The reversal of 981694450371 is 173054496189.

It is a happy number.

It is not a de Polignac number, because 981694450371 - 2⁹ = 981694449859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981694450379) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2355975 + ... + 2741168.

It is an arithmetic number, because the mean of its divisors is an integer number (83766464496).

Almost surely, 2^981694450371 is an apocalyptic number.

981694450371 is a deficient number, since it is larger than the sum of its proper divisors (358568981565).

981694450371 is a wasteful number, since it uses less digits than its factorization.

981694450371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098682.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 981694450371 in words is "nine hundred eighty-one billion, six hundred ninety-four million, four hundred fifty thousand, three hundred seventy-one".