180825001566 has 64 divisors (see below), whose sum is σ = 418777537536. Its totient is φ = 51443456000.

The previous prime is 180825001559. The next prime is 180825001601. The reversal of 180825001566 is 665100528081.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248971 + ... + 650873.

It is an arithmetic number, because the mean of its divisors is an integer number (6543399024).

Almost surely, 2^180825001566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180825001566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209388768768).

180825001566 is an abundant number, since it is smaller than the sum of its proper divisors (237952535970).

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

180825001566 is a wasteful number, since it uses less digits than its factorization.

180825001566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402337.

The product of its (nonzero) digits is 115200, while the sum is 42.

The spelling of 180825001566 in words is "one hundred eighty billion, eight hundred twenty-five million, one thousand, five hundred sixty-six".