978849231031 has 12 divisors (see below), whose sum is σ = 1140846910560. Its totient is φ = 837403213920.

The previous prime is 978849231023. The next prime is 978849231067. The reversal of 978849231031 is 130132948879.

It is a happy number.

It is not a de Polignac number, because 978849231031 - 2³ = 978849231023 is a prime.

It is a super-2 number, since 2×978849231031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978849231091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19145791 + ... + 19196848.

It is an arithmetic number, because the mean of its divisors is an integer number (95070575880).

Almost surely, 2^978849231031 is an apocalyptic number.

978849231031 is a deficient number, since it is larger than the sum of its proper divisors (161997679529).

978849231031 is a wasteful number, since it uses less digits than its factorization.

978849231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38343174 (or 38343167 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 978849231031 in words is "nine hundred seventy-eight billion, eight hundred forty-nine million, two hundred thirty-one thousand, thirty-one".