525764513320661 has 16 divisors (see below), whose sum is σ = 536631077437440. Its totient is φ = 515003522145840.

The previous prime is 525764513320639. The next prime is 525764513320679. The reversal of 525764513320661 is 166023315467525.

It is a cyclic number.

It is not a de Polignac number, because 525764513320661 - 2¹⁸ = 525764513058517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 525764513320597 and 525764513320606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525764513328661) 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, 286339670 + ... + 288169976.

It is an arithmetic number, because the mean of its divisors is an integer number (33539442339840).

Almost surely, 2^{525764513320661} is an apocalyptic number.

It is an amenable number.

525764513320661 is a deficient number, since it is larger than the sum of its proper divisors (10866564116779).

525764513320661 is a wasteful number, since it uses less digits than its factorization.

525764513320661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859144.

The product of its (nonzero) digits is 27216000, while the sum is 56.

The spelling of 525764513320661 in words is "five hundred twenty-five trillion, seven hundred sixty-four billion, five hundred thirteen million, three hundred twenty thousand, six hundred sixty-one".