42561354642 has 16 divisors (see below), whose sum is σ = 85130166240. Its totient is φ = 14185875392.

The previous prime is 42561354623. The next prime is 42561354653. The reversal of 42561354642 is 24645316524.

It is a happy number.

It is a super-2 number, since 2×42561354642² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42561354594 and 42561354603.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235092 + ... + 374687.

It is an arithmetic number, because the mean of its divisors is an integer number (5320635390).

Almost surely, 2^42561354642 is an apocalyptic number.

42561354642 is an abundant number, since it is smaller than the sum of its proper divisors (42568811598).

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

42561354642 is a wasteful number, since it uses less digits than its factorization.

42561354642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621417.

The product of its digits is 691200, while the sum is 42.

The spelling of 42561354642 in words is "forty-two billion, five hundred sixty-one million, three hundred fifty-four thousand, six hundred forty-two".