642610106445 has 8 divisors (see below), whose sum is σ = 1028176170336. Its totient is φ = 342725390096.

The previous prime is 642610106443. The next prime is 642610106461. The reversal of 642610106445 is 544601016246.

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

It is a cyclic number.

It is not a de Polignac number, because 642610106445 - 2¹ = 642610106443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642610106443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21420336867 + ... + 21420336896.

It is an arithmetic number, because the mean of its divisors is an integer number (128522021292).

Almost surely, 2^642610106445 is an apocalyptic number.

It is an amenable number.

642610106445 is a deficient number, since it is larger than the sum of its proper divisors (385566063891).

642610106445 is a wasteful number, since it uses less digits than its factorization.

642610106445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42840673771.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 642610106445 in words is "six hundred forty-two billion, six hundred ten million, one hundred six thousand, four hundred forty-five".