525664491 has 16 divisors (see below), whose sum is σ = 765073920. Its totient is φ = 318388320.

The previous prime is 525664483. The next prime is 525664493. The reversal of 525664491 is 194466525.

It is not a de Polignac number, because 525664491 - 2³ = 525664483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (525664493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63870 + ... + 71628.

It is an arithmetic number, because the mean of its divisors is an integer number (47817120).

Almost surely, 2^525664491 is an apocalyptic number.

525664491 is a deficient number, since it is larger than the sum of its proper divisors (239409429).

525664491 is a wasteful number, since it uses less digits than its factorization.

525664491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9826.

The product of its digits is 259200, while the sum is 42.

The square root of 525664491 is about 22927.3742718175. The cubic root of 525664491 is about 807.0545315236.

The spelling of 525664491 in words is "five hundred twenty-five million, six hundred sixty-four thousand, four hundred ninety-one".