5125704121661 has 8 divisors (see below), whose sum is σ = 5141968619520. Its totient is φ = 5109440222448.

The previous prime is 5125704121651. The next prime is 5125704121663. The reversal of 5125704121661 is 1661214075215.

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 5125704121661 - 2³⁰ = 5124630379837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5125704121663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22354580 + ... + 22582706.

It is an arithmetic number, because the mean of its divisors is an integer number (642746077440).

Almost surely, 2^{5125704121661} is an apocalyptic number.

It is an amenable number.

5125704121661 is a deficient number, since it is larger than the sum of its proper divisors (16264497859).

5125704121661 is a wasteful number, since it uses less digits than its factorization.

5125704121661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299323.

The product of its (nonzero) digits is 100800, while the sum is 41.

Adding to 5125704121661 its reverse (1661214075215), we get a palindrome (6786918196876).

The spelling of 5125704121661 in words is "five trillion, one hundred twenty-five billion, seven hundred four million, one hundred twenty-one thousand, six hundred sixty-one".