42561412251 has 8 divisors (see below), whose sum is σ = 59735315520. Its totient is φ = 26880891912.

The previous prime is 42561412249. The next prime is 42561412259. The reversal of 42561412251 is 15221416524.

It is a happy number.

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

It is not a de Polignac number, because 42561412251 - 2¹ = 42561412249 is a prime.

It is a super-2 number, since 2×42561412251² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42561412259) 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, 373345665 + ... + 373345778.

It is an arithmetic number, because the mean of its divisors is an integer number (7466914440).

Almost surely, 2^42561412251 is an apocalyptic number.

42561412251 is a deficient number, since it is larger than the sum of its proper divisors (17173903269).

42561412251 is a wasteful number, since it uses less digits than its factorization.

42561412251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746691465.

The product of its digits is 19200, while the sum is 33.

Adding to 42561412251 its reverse (15221416524), we get a palindrome (57782828775).

The spelling of 42561412251 in words is "forty-two billion, five hundred sixty-one million, four hundred twelve thousand, two hundred fifty-one".