525984940721 has 4 divisors (see below), whose sum is σ = 544122352500. Its totient is φ = 507847528944.

The previous prime is 525984940711. The next prime is 525984940729. The reversal of 525984940721 is 127049489525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 161313886321 + 364671054400 = 401639^2 + 603880^2 .

It is a cyclic number.

It is not a de Polignac number, because 525984940721 - 2¹⁸ = 525984678577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525984940729) 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, 9068705846 + ... + 9068705903.

It is an arithmetic number, because the mean of its divisors is an integer number (136030588125).

Almost surely, 2^525984940721 is an apocalyptic number.

It is an amenable number.

525984940721 is a deficient number, since it is larger than the sum of its proper divisors (18137411779).

525984940721 is a wasteful number, since it uses less digits than its factorization.

525984940721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18137411778.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 525984940721 in words is "five hundred twenty-five billion, nine hundred eighty-four million, nine hundred forty thousand, seven hundred twenty-one".