5128256949 has 16 divisors (see below), whose sum is σ = 6895069440. Its totient is φ = 3390229440.

The previous prime is 5128256929. The next prime is 5128256953. The reversal of 5128256949 is 9496528215.

It is not a de Polignac number, because 5128256949 - 2¹⁵ = 5128224181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5128256929) 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, 229044 + ... + 250434.

It is an arithmetic number, because the mean of its divisors is an integer number (430941840).

Almost surely, 2^5128256949 is an apocalyptic number.

It is an amenable number.

5128256949 is a deficient number, since it is larger than the sum of its proper divisors (1766812491).

5128256949 is a wasteful number, since it uses less digits than its factorization.

5128256949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22060.

The product of its digits is 1555200, while the sum is 51.

The square root of 5128256949 is about 71611.8492220387. The cubic root of 5128256949 is about 1724.4737678172.

The spelling of 5128256949 in words is "five billion, one hundred twenty-eight million, two hundred fifty-six thousand, nine hundred forty-nine".