42420064642 has 8 divisors (see below), whose sum is σ = 65682680832. Its totient is φ = 20525837700.

The previous prime is 42420064607. The next prime is 42420064663. The reversal of 42420064642 is 24646002424.

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

It is a junction number, because it is equal to n+sod(n) for n = 42420064598 and 42420064607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342097234 + ... + 342097357.

It is an arithmetic number, because the mean of its divisors is an integer number (8210335104).

Almost surely, 2^42420064642 is an apocalyptic number.

42420064642 is a deficient number, since it is larger than the sum of its proper divisors (23262616190).

42420064642 is a wasteful number, since it uses less digits than its factorization.

42420064642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684194624.

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 42420064642 in words is "forty-two billion, four hundred twenty million, sixty-four thousand, six hundred forty-two".