42561459445 has 8 divisors (see below), whose sum is σ = 51542318520. Its totient is φ = 33736789440.

The previous prime is 42561459397. The next prime is 42561459463. The reversal of 42561459445 is 54495416524.

It can be written as a sum of positive squares in 4 ways, for example, as 6075111249 + 36486348196 = 77943^2 + 191014^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-42561459445 is a prime.

It is a super-2 number, since 2×42561459445² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 39046666 + ... + 39047755.

It is an arithmetic number, because the mean of its divisors is an integer number (6442789815).

Almost surely, 2^42561459445 is an apocalyptic number.

It is an amenable number.

42561459445 is a deficient number, since it is larger than the sum of its proper divisors (8980859075).

42561459445 is a wasteful number, since it uses less digits than its factorization.

42561459445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78094535.

The product of its digits is 3456000, while the sum is 49.

The spelling of 42561459445 in words is "forty-two billion, five hundred sixty-one million, four hundred fifty-nine thousand, four hundred forty-five".