981944000155 has 32 divisors (see below), whose sum is σ = 1187814832128. Its totient is φ = 779267520000.

The previous prime is 981944000153. The next prime is 981944000159. The reversal of 981944000155 is 551000449189.

It is a happy number.

981944000155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 981944000155 - 2¹ = 981944000153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981944000153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 344419480 + ... + 344422330.

It is an arithmetic number, because the mean of its divisors is an integer number (37119213504).

Almost surely, 2^981944000155 is an apocalyptic number.

981944000155 is a deficient number, since it is larger than the sum of its proper divisors (205870831973).

981944000155 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (981944000154) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (4147).

981944000155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4147.

The product of its (nonzero) digits is 259200, while the sum is 46.

The spelling of 981944000155 in words is "nine hundred eighty-one billion, nine hundred forty-four million, one hundred fifty-five", and thus it is an aban number.