74431984923866 has 4 divisors (see below), whose sum is σ = 111647977385802. Its totient is φ = 37215992461932.

The previous prime is 74431984923827. The next prime is 74431984923869. The reversal of 74431984923866 is 66832948913447.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71874432338641 + 2557552585225 = 8477879^2 + 1599235^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74431984923793 and 74431984923802.

It is not an unprimeable number, because it can be changed into a prime (74431984923869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18607996230965 + ... + 18607996230968.

Almost surely, 2^{74431984923866} is an apocalyptic number.

74431984923866 is a deficient number, since it is larger than the sum of its proper divisors (37215992461936).

74431984923866 is a wasteful number, since it uses less digits than its factorization.

74431984923866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37215992461935.

The product of its digits is 1504935936, while the sum is 74.

The spelling of 74431984923866 in words is "seventy-four trillion, four hundred thirty-one billion, nine hundred eighty-four million, nine hundred twenty-three thousand, eight hundred sixty-six".