525664761 has 4 divisors (see below), whose sum is σ = 700886352. Its totient is φ = 350443172.

The previous prime is 525664757. The next prime is 525664771. The reversal of 525664761 is 167466525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 525664761 - 2² = 525664757 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (525664721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87610791 + ... + 87610796.

It is an arithmetic number, because the mean of its divisors is an integer number (175221588).

Almost surely, 2^525664761 is an apocalyptic number.

It is an amenable number.

525664761 is a deficient number, since it is larger than the sum of its proper divisors (175221591).

525664761 is a wasteful number, since it uses less digits than its factorization.

525664761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175221590.

The product of its digits is 302400, while the sum is 42.

The square root of 525664761 is about 22927.3801599747. The cubic root of 525664761 is about 807.0546697008.

The spelling of 525664761 in words is "five hundred twenty-five million, six hundred sixty-four thousand, seven hundred sixty-one".