525501660000 has 120 divisors (see below), whose sum is σ = 1723750741944. Its totient is φ = 140133760000.

The previous prime is 525501659993. The next prime is 525501660031. The reversal of 525501660000 is 66105525.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 525501660000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4319181 + ... + 4439180.

Almost surely, 2^525501660000 is an apocalyptic number.

525501660000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

525501660000 is an abundant number, since it is smaller than the sum of its proper divisors (1198249081944).

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

525501660000 is an equidigital number, since it uses as much as digits as its factorization.

525501660000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8758394 (or 8758371 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 525501660000 its reverse (66105525), we get a palindrome (525567765525).

The spelling of 525501660000 in words is "five hundred twenty-five billion, five hundred one million, six hundred sixty thousand".