42561918061506 has 48 divisors (see below), whose sum is σ = 94695517309536. Its totient is φ = 13808402633088.

The previous prime is 42561918061493. The next prime is 42561918061517. The reversal of 42561918061506 is 60516081916524.

It is a happy number.

42561918061506 is a `hidden beast` number, since 4 + 2 + 5 + 6 + 1 + 9 + 18 + 0 + 615 + 0 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96935655 + ... + 97373738.

It is an arithmetic number, because the mean of its divisors is an integer number (1972823277282).

Almost surely, 2^{42561918061506} is an apocalyptic number.

42561918061506 is an abundant number, since it is smaller than the sum of its proper divisors (52133599248030).

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

42561918061506 is a wasteful number, since it uses less digits than its factorization.

42561918061506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194309727 (or 194309724 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 42561918061506 in words is "forty-two trillion, five hundred sixty-one billion, nine hundred eighteen million, sixty-one thousand, five hundred six".