42540444453521 has 16 divisors (see below), whose sum is σ = 48976183795968. Its totient is φ = 36195325152000.

The previous prime is 42540444453473. The next prime is 42540444453553. The reversal of 42540444453521 is 12535444404524.

It is not a de Polignac number, because 42540444453521 - 2⁶ = 42540444453457 is a prime.

It is a super-2 number, since 2×42540444453521² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42540440453521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40598780 + ... + 41633421.

It is an arithmetic number, because the mean of its divisors is an integer number (3061011487248).

Almost surely, 2^{42540444453521} is an apocalyptic number.

It is an amenable number.

42540444453521 is a deficient number, since it is larger than the sum of its proper divisors (6435739342447).

42540444453521 is a wasteful number, since it uses less digits than its factorization.

42540444453521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82232752.

The product of its (nonzero) digits is 6144000, while the sum is 47.

The spelling of 42540444453521 in words is "forty-two trillion, five hundred forty billion, four hundred forty-four million, four hundred fifty-three thousand, five hundred twenty-one".