525661809907 has 8 divisors (see below), whose sum is σ = 566111624960. Its totient is φ = 485214036480.

The previous prime is 525661809857. The next prime is 525661809947. The reversal of 525661809907 is 709908166525.

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 525661809907 - 2¹⁹ = 525661285619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525661809947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46894 + ... + 1026412.

It is an arithmetic number, because the mean of its divisors is an integer number (70763953120).

Almost surely, 2^525661809907 is an apocalyptic number.

525661809907 is a deficient number, since it is larger than the sum of its proper divisors (40449815053).

525661809907 is a wasteful number, since it uses less digits than its factorization.

525661809907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020813.

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 525661809907 in words is "five hundred twenty-five billion, six hundred sixty-one million, eight hundred nine thousand, nine hundred seven".