6128739545 has 4 divisors (see below), whose sum is σ = 7354487460. Its totient is φ = 4902991632.

The previous prime is 6128739523. The next prime is 6128739557. The reversal of 6128739545 is 5459378216.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4165540681 + 1963198864 = 64541^2 + 44308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6128739545 is a prime.

It is a super-2 number, since 2×6128739545² = 75122896820893614050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6128739493 and 6128739502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612873950 + ... + 612873959.

It is an arithmetic number, because the mean of its divisors is an integer number (1838621865).

Almost surely, 2^6128739545 is an apocalyptic number.

It is an amenable number.

6128739545 is a deficient number, since it is larger than the sum of its proper divisors (1225747915).

6128739545 is a wasteful number, since it uses less digits than its factorization.

6128739545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225747914.

The product of its digits is 1814400, while the sum is 50.

The square root of 6128739545 is about 78286.2666436457. The cubic root of 6128739545 is about 1830.0251367644.

The spelling of 6128739545 in words is "six billion, one hundred twenty-eight million, seven hundred thirty-nine thousand, five hundred forty-five".