525445661 has 8 divisors (see below), whose sum is σ = 566257440. Its totient is φ = 484690032.

The previous prime is 525445651. The next prime is 525445667. The reversal of 525445661 is 166544525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 525445661 - 2⁶ = 525445597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525445667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6530 + ... + 33068.

It is an arithmetic number, because the mean of its divisors is an integer number (70782180).

Almost surely, 2^525445661 is an apocalyptic number.

It is an amenable number.

525445661 is a deficient number, since it is larger than the sum of its proper divisors (40811779).

525445661 is a wasteful number, since it uses less digits than its factorization.

525445661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28075.

The product of its digits is 144000, while the sum is 38.

The square root of 525445661 is about 22922.6015321124. The cubic root of 525445661 is about 806.9425258250.

The spelling of 525445661 in words is "five hundred twenty-five million, four hundred forty-five thousand, six hundred sixty-one".