42156125545 has 8 divisors (see below), whose sum is σ = 50844140424. Its totient is φ = 33553707264.

The previous prime is 42156125443. The next prime is 42156125563. The reversal of 42156125545 is 54552165124.

It can be written as a sum of positive squares in 4 ways, for example, as 18974236009 + 23181889536 = 137747^2 + 152256^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42156125545 - 2¹¹ = 42156123497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42156125498 and 42156125507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21398064 + ... + 21400033.

It is an arithmetic number, because the mean of its divisors is an integer number (6355517553).

Almost surely, 2^42156125545 is an apocalyptic number.

It is an amenable number.

42156125545 is a deficient number, since it is larger than the sum of its proper divisors (8688014879).

42156125545 is a wasteful number, since it uses less digits than its factorization.

42156125545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42798299.

The product of its digits is 240000, while the sum is 40.

The spelling of 42156125545 in words is "forty-two billion, one hundred fifty-six million, one hundred twenty-five thousand, five hundred forty-five".