525534144520 has 128 divisors (see below), whose sum is σ = 1476612633600. Its totient is φ = 163537632000.

The previous prime is 525534144517. The next prime is 525534144529. The reversal of 525534144520 is 25441435525.

It is a super-2 number, since 2×525534144520² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (525534144529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1768695 + ... + 2044345.

It is an arithmetic number, because the mean of its divisors is an integer number (11536036200).

Almost surely, 2^525534144520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525534144520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738306316800).

525534144520 is an abundant number, since it is smaller than the sum of its proper divisors (951078489080).

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

525534144520 is a wasteful number, since it uses less digits than its factorization.

525534144520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276299 (or 276295 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 525534144520 in words is "five hundred twenty-five billion, five hundred thirty-four million, one hundred forty-four thousand, five hundred twenty".