981945154268 has 12 divisors (see below), whose sum is σ = 1850588944680. Its totient is φ = 453205455792.

The previous prime is 981945154243. The next prime is 981945154273. The reversal of 981945154268 is 862451549189.

It is a self number, because there is not a number n which added to its sum of digits gives 981945154268.

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 3 ways as a sum of consecutive naturals, for example, 9441780278 + ... + 9441780381.

It is an arithmetic number, because the mean of its divisors is an integer number (154215745390).

Almost surely, 2^981945154268 is an apocalyptic number.

It is an amenable number.

981945154268 is a deficient number, since it is larger than the sum of its proper divisors (868643790412).

981945154268 is a wasteful number, since it uses less digits than its factorization.

981945154268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18883560676 (or 18883560674 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 62.

The spelling of 981945154268 in words is "nine hundred eighty-one billion, nine hundred forty-five million, one hundred fifty-four thousand, two hundred sixty-eight".