642031188441 has 8 divisors (see below), whose sum is σ = 856197052704. Its totient is φ = 427943058240.

The previous prime is 642031188433. The next prime is 642031188493. The reversal of 642031188441 is 144881130246.

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

It is not a de Polignac number, because 642031188441 - 2³ = 642031188433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642031188393 and 642031188402.

It is not an unprimeable number, because it can be changed into a prime (642031188641) 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, 19414240 + ... + 19447281.

It is an arithmetic number, because the mean of its divisors is an integer number (107024631588).

Almost surely, 2^642031188441 is an apocalyptic number.

It is an amenable number.

642031188441 is a deficient number, since it is larger than the sum of its proper divisors (214165864263).

642031188441 is a wasteful number, since it uses less digits than its factorization.

642031188441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38867031.

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 642031188441 in words is "six hundred forty-two billion, thirty-one million, one hundred eighty-eight thousand, four hundred forty-one".