42161406725 has 12 divisors (see below), whose sum is σ = 52284826176. Its totient is φ = 33726104880.

The previous prime is 42161406701. The next prime is 42161406739. The reversal of 42161406725 is 52760416124.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-42161406725 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234134 + ... + 373016.

It is an arithmetic number, because the mean of its divisors is an integer number (4357068848).

Almost surely, 2^42161406725 is an apocalyptic number.

It is an amenable number.

42161406725 is a deficient number, since it is larger than the sum of its proper divisors (10123419451).

42161406725 is a wasteful number, since it uses less digits than its factorization.

42161406725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151036 (or 151031 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 42161406725 in words is "forty-two billion, one hundred sixty-one million, four hundred six thousand, seven hundred twenty-five".