1023938393866 has 32 divisors (see below), whose sum is σ = 1628873769600. Its totient is φ = 481390387200.

The previous prime is 1023938393851. The next prime is 1023938393867. The reversal of 1023938393866 is 6683938393201.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1023938393867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6538530 + ... + 6693298.

It is an arithmetic number, because the mean of its divisors is an integer number (50902305300).

Almost surely, 2^{1023938393866} is an apocalyptic number.

1023938393866 is a deficient number, since it is larger than the sum of its proper divisors (604935375734).

1023938393866 is a wasteful number, since it uses less digits than its factorization.

1023938393866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156094.

The product of its (nonzero) digits is 30233088, while the sum is 61.

The spelling of 1023938393866 in words is "one trillion, twenty-three billion, nine hundred thirty-eight million, three hundred ninety-three thousand, eight hundred sixty-six".