42518906564 has 12 divisors (see below), whose sum is σ = 74414237100. Its totient is φ = 21257695968.

The previous prime is 42518906543. The next prime is 42518906581. The reversal of 42518906564 is 46560981524.

It can be written as a sum of positive squares in 2 ways, for example, as 22317969664 + 20200936900 = 149392^2 + 142130^2 .

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, 384119 + ... + 482270.

It is an arithmetic number, because the mean of its divisors is an integer number (6201186425).

Almost surely, 2^42518906564 is an apocalyptic number.

It is an amenable number.

42518906564 is a deficient number, since it is larger than the sum of its proper divisors (31895330536).

42518906564 is a wasteful number, since it uses less digits than its factorization.

42518906564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878662 (or 878660 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 42518906564 in words is "forty-two billion, five hundred eighteen million, nine hundred six thousand, five hundred sixty-four".