5125844661 has 16 divisors (see below), whose sum is σ = 7815833088. Its totient is φ = 2927170800.

The previous prime is 5125844621. The next prime is 5125844671. The reversal of 5125844661 is 1664485215.

It is not a de Polignac number, because 5125844661 - 2⁷ = 5125844533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5125844621) 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, 44695 + ... + 110676.

It is an arithmetic number, because the mean of its divisors is an integer number (488489568).

Almost surely, 2^5125844661 is an apocalyptic number.

It is an amenable number.

5125844661 is a deficient number, since it is larger than the sum of its proper divisors (2689988427).

5125844661 is a wasteful number, since it uses less digits than its factorization.

5125844661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156952.

The product of its digits is 230400, while the sum is 42.

The square root of 5125844661 is about 71595.0044416508. The cubic root of 5125844661 is about 1724.2033328622.

The spelling of 5125844661 in words is "five billion, one hundred twenty-five million, eight hundred forty-four thousand, six hundred sixty-one".