9791230321978 has 64 divisors (see below), whose sum is σ = 17287951564800. Its totient is φ = 4071626697600.

The previous prime is 9791230321967. The next prime is 9791230322057. The reversal of 9791230321978 is 8791230321979.

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 31 ways as a sum of consecutive naturals, for example, 295943025 + ... + 295976107.

It is an arithmetic number, because the mean of its divisors is an integer number (270124243200).

Almost surely, 2^{9791230321978} is an apocalyptic number.

9791230321978 is a deficient number, since it is larger than the sum of its proper divisors (7496721242822).

9791230321978 is a wasteful number, since it uses less digits than its factorization.

9791230321978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35923.

The product of its (nonzero) digits is 10287648, while the sum is 61.

Subtracting from 9791230321978 its reverse (8791230321979), we obtain a palindrome (999999999999).

The spelling of 9791230321978 in words is "nine trillion, seven hundred ninety-one billion, two hundred thirty million, three hundred twenty-one thousand, nine hundred seventy-eight".