42512444421525 has 192 divisors, whose sum is σ = 87891414589440. Its totient is φ = 20007523065600.

The previous prime is 42512444421511. The next prime is 42512444421553. The reversal of 42512444421525 is 52512444421524.

42512444421525 is a `hidden beast` number, since 4 + 2 + 5 + 12 + 44 + 442 + 152 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-42512444421525 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 191 ways as a sum of consecutive naturals, for example, 16535680 + ... + 18932870.

It is an arithmetic number, because the mean of its divisors is an integer number (457767784320).

Almost surely, 2^{42512444421525} is an apocalyptic number.

42512444421525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42512444421525 is an abundant number, since it is smaller than the sum of its proper divisors (45378970167915).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42512444421525 is a wasteful number, since it uses less digits than its factorization.

42512444421525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397313 (or 2397302 counting only the distinct ones).

The product of its digits is 2048000, while the sum is 45.

Subtracting 42512444421525 from its reverse (52512444421524), we obtain a palindrome (9999999999999).

The spelling of 42512444421525 in words is "forty-two trillion, five hundred twelve billion, four hundred forty-four million, four hundred twenty-one thousand, five hundred twenty-five".