5128321577 has 4 divisors (see below), whose sum is σ = 5193237120. Its totient is φ = 5063406036.

The previous prime is 5128321567. The next prime is 5128321579. The reversal of 5128321577 is 7751238215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5128321577 - 2²² = 5124127273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5128321579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32457653 + ... + 32457810.

It is an arithmetic number, because the mean of its divisors is an integer number (1298309280).

Almost surely, 2^5128321577 is an apocalyptic number.

It is an amenable number.

5128321577 is a deficient number, since it is larger than the sum of its proper divisors (64915543).

5128321577 is an equidigital number, since it uses as much as digits as its factorization.

5128321577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64915542.

The product of its digits is 117600, while the sum is 41.

The square root of 5128321577 is about 71612.3004587899. The cubic root of 5128321577 is about 1724.4810119175.

The spelling of 5128321577 in words is "five billion, one hundred twenty-eight million, three hundred twenty-one thousand, five hundred seventy-seven".