642631104445 has 8 divisors (see below), whose sum is σ = 841262536800. Its totient is φ = 467368075920.

The previous prime is 642631104431. The next prime is 642631104449. The reversal of 642631104445 is 544401136246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642631104445 - 2⁷ = 642631104317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642631104398 and 642631104407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642631104449) 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, 5842100895 + ... + 5842101004.

It is an arithmetic number, because the mean of its divisors is an integer number (105157817100).

Almost surely, 2^642631104445 is an apocalyptic number.

It is an amenable number.

642631104445 is a deficient number, since it is larger than the sum of its proper divisors (198631432355).

642631104445 is a wasteful number, since it uses less digits than its factorization.

642631104445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11684201915.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 642631104445 in words is "six hundred forty-two billion, six hundred thirty-one million, one hundred four thousand, four hundred forty-five".