45128019779 has 4 divisors (see below), whose sum is σ = 45134054784. Its totient is φ = 45121984776.

The previous prime is 45128019757. The next prime is 45128019793. The reversal of 45128019779 is 97791082154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97791082154 = 2 ⋅48895541077.

It is a cyclic number.

It is not a de Polignac number, because 45128019779 - 2¹² = 45128015683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45128019779.

It is not an unprimeable number, because it can be changed into a prime (45128019709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3006272 + ... + 3021245.

It is an arithmetic number, because the mean of its divisors is an integer number (11283513696).

Almost surely, 2^45128019779 is an apocalyptic number.

45128019779 is a deficient number, since it is larger than the sum of its proper divisors (6035005).

45128019779 is an equidigital number, since it uses as much as digits as its factorization.

45128019779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035004.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 45128019779 in words is "forty-five billion, one hundred twenty-eight million, nineteen thousand, seven hundred seventy-nine".