642633212744 has 32 divisors (see below), whose sum is σ = 1218782295000. Its totient is φ = 317626417152.

The previous prime is 642633212743. The next prime is 642633212783. The reversal of 642633212744 is 447212336246.

It can be written as a sum of positive squares in 4 ways, for example, as 420850612900 + 221782599844 = 648730^2 + 470938^2 .

It is a super-2 number, since 2×642633212744² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 642633212695 and 642633212704.

It is not an unprimeable number, because it can be changed into a prime (642633212743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2771432 + ... + 2994344.

Almost surely, 2^642633212744 is an apocalyptic number.

It is an amenable number.

642633212744 is a deficient number, since it is larger than the sum of its proper divisors (576149082256).

642633212744 is a wasteful number, since it uses less digits than its factorization.

642633212744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227057 (or 227053 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 44.

The spelling of 642633212744 in words is "six hundred forty-two billion, six hundred thirty-three million, two hundred twelve thousand, seven hundred forty-four".