42561251404 has 24 divisors (see below), whose sum is σ = 87423113120. Its totient is φ = 17747548416.

The previous prime is 42561251401. The next prime is 42561251443. The reversal of 42561251404 is 40415216524.

It is a super-2 number, since 2×42561251404² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42561251404.

It is not an unprimeable number, because it can be changed into a prime (42561251401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20540109 + ... + 20542180.

Almost surely, 2^42561251404 is an apocalyptic number.

It is an amenable number.

42561251404 is an abundant number, since it is smaller than the sum of its proper divisors (44861861716).

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

42561251404 is a wasteful number, since it uses less digits than its factorization.

42561251404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41082337 (or 41082335 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 42561251404 its reverse (40415216524), we get a palindrome (82976467928).

The spelling of 42561251404 in words is "forty-two billion, five hundred sixty-one million, two hundred fifty-one thousand, four hundred four".