525445864 has 8 divisors (see below), whose sum is σ = 985211010. Its totient is φ = 262722928.

The previous prime is 525445849. The next prime is 525445871. The reversal of 525445864 is 468544525.

It can be written as a sum of positive squares in only one way, i.e., 352312900 + 173132964 = 18770^2 + 13158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 525445864.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32840359 + ... + 32840374.

Almost surely, 2^525445864 is an apocalyptic number.

It is an amenable number.

525445864 is a deficient number, since it is larger than the sum of its proper divisors (459765146).

525445864 is a wasteful number, since it uses less digits than its factorization.

525445864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65680739 (or 65680735 counting only the distinct ones).

The product of its digits is 768000, while the sum is 43.

The square root of 525445864 is about 22922.6059600561. The cubic root of 525445864 is about 806.9426297427.

The spelling of 525445864 in words is "five hundred twenty-five million, four hundred forty-five thousand, eight hundred sixty-four".