5245120661 has 16 divisors (see below), whose sum is σ = 5858837568. Its totient is φ = 4655481600.

The previous prime is 5245120631. The next prime is 5245120667. The reversal of 5245120661 is 1660215425.

It is not a de Polignac number, because 5245120661 - 2⁶ = 5245120597 is a prime.

It is a super-2 number, since 2×5245120661² = 55022581496898153842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5245120667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51791 + ... + 114771.

It is an arithmetic number, because the mean of its divisors is an integer number (366177348).

Almost surely, 2^5245120661 is an apocalyptic number.

It is an amenable number.

5245120661 is a deficient number, since it is larger than the sum of its proper divisors (613716907).

5245120661 is a wasteful number, since it uses less digits than its factorization.

5245120661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63172.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 5245120661 is about 72423.2052659919. The cubic root of 5245120661 is about 1737.4747202367.

The spelling of 5245120661 in words is "five billion, two hundred forty-five million, one hundred twenty thousand, six hundred sixty-one".