642733366970 has 16 divisors (see below), whose sum is σ = 1156955290920. Its totient is φ = 257085517824.

The previous prime is 642733366963. The next prime is 642733366973. The reversal of 642733366970 is 79663337246.

It can be written as a sum of positive squares in 4 ways, for example, as 599319060649 + 43414306321 = 774157^2 + 208361^2 .

It is not an unprimeable number, because it can be changed into a prime (642733366973) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 627827 + ... + 1296006.

Almost surely, 2^642733366970 is an apocalyptic number.

642733366970 is a deficient number, since it is larger than the sum of its proper divisors (514221923950).

642733366970 is a wasteful number, since it uses less digits than its factorization.

642733366970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957249.

The product of its (nonzero) digits is 20575296, while the sum is 56.

The spelling of 642733366970 in words is "six hundred forty-two billion, seven hundred thirty-three million, three hundred sixty-six thousand, nine hundred seventy".