42645816525 has 48 divisors (see below), whose sum is σ = 77697346496. Its totient is φ = 20506590720.

The previous prime is 42645816523. The next prime is 42645816529. The reversal of 42645816525 is 52561854624.

It is not a de Polignac number, because 42645816525 - 2¹ = 42645816523 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645816523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 466672 + ... + 550521.

Almost surely, 2^42645816525 is an apocalyptic number.

It is an amenable number.

42645816525 is a deficient number, since it is larger than the sum of its proper divisors (35051529971).

42645816525 is a wasteful number, since it uses less digits than its factorization.

42645816525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017262 (or 1017257 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 48.

The spelling of 42645816525 in words is "forty-two billion, six hundred forty-five million, eight hundred sixteen thousand, five hundred twenty-five".