5120325661 has 12 divisors (see below), whose sum is σ = 5691375900. Its totient is φ = 4602530240.

The previous prime is 5120325649. The next prime is 5120325667. The reversal of 5120325661 is 1665230215.

It can be written as a sum of positive squares in 2 ways, for example, as 2499500025 + 2620825636 = 49995^2 + 51194^2 .

It is not a de Polignac number, because 5120325661 - 2⁵ = 5120325629 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 (5120325667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226966 + ... + 248503.

It is an arithmetic number, because the mean of its divisors is an integer number (474281325).

Almost surely, 2^5120325661 is an apocalyptic number.

It is an amenable number.

5120325661 is a deficient number, since it is larger than the sum of its proper divisors (571050239).

5120325661 is a wasteful number, since it uses less digits than its factorization.

5120325661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475580 (or 475569 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 5120325661 is about 71556.4508692263. The cubic root of 5120325661 is about 1723.5842937172.

Adding to 5120325661 its reverse (1665230215), we get a palindrome (6785555876).

The spelling of 5120325661 in words is "five billion, one hundred twenty million, three hundred twenty-five thousand, six hundred sixty-one".