42521624525 has 24 divisors (see below), whose sum is σ = 53061648480. Its totient is φ = 33801573440.

The previous prime is 42521624473. The next prime is 42521624531. The reversal of 42521624525 is 52542612524.

It is a de Polignac number, because none of the positive numbers 2^k-42521624525 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7752434 + ... + 7757916.

It is an arithmetic number, because the mean of its divisors is an integer number (2210902020).

Almost surely, 2^42521624525 is an apocalyptic number.

It is an amenable number.

42521624525 is a deficient number, since it is larger than the sum of its proper divisors (10540023955).

42521624525 is a wasteful number, since it uses less digits than its factorization.

42521624525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7405 (or 7400 counting only the distinct ones).

The product of its digits is 192000, while the sum is 38.

The spelling of 42521624525 in words is "forty-two billion, five hundred twenty-one million, six hundred twenty-four thousand, five hundred twenty-five".