42420644064642 has 32 divisors (see below), whose sum is σ = 84966471797760. Its totient is φ = 14119359685200.

The previous prime is 42420644064611. The next prime is 42420644064649. The reversal of 42420644064642 is 24646044602424.

42420644064642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42420644064642² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42420644064591 and 42420644064600.

It is not an unprimeable number, because it can be changed into a prime (42420644064649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17900859 + ... + 20131617.

It is an arithmetic number, because the mean of its divisors is an integer number (2655202243680).

Almost surely, 2^{42420644064642} is an apocalyptic number.

42420644064642 is an abundant number, since it is smaller than the sum of its proper divisors (42545827733118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42420644064642 is a wasteful number, since it uses less digits than its factorization.

42420644064642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235438.

The product of its (nonzero) digits is 7077888, while the sum is 48.

The spelling of 42420644064642 in words is "forty-two trillion, four hundred twenty billion, six hundred forty-four million, sixty-four thousand, six hundred forty-two".