44720728077 has 4 divisors (see below), whose sum is σ = 59627637440. Its totient is φ = 29813818716.

The previous prime is 44720728069. The next prime is 44720728079. The reversal of 44720728077 is 77082702744.

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 not a de Polignac number, because 44720728077 - 2³ = 44720728069 is a prime.

It is a super-2 number, since 2×44720728077² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44720728079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7453454677 + ... + 7453454682.

It is an arithmetic number, because the mean of its divisors is an integer number (14906909360).

Almost surely, 2^44720728077 is an apocalyptic number.

It is an amenable number.

44720728077 is a deficient number, since it is larger than the sum of its proper divisors (14906909363).

44720728077 is a wasteful number, since it uses less digits than its factorization.

44720728077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14906909362.

The product of its (nonzero) digits is 1229312, while the sum is 48.

The spelling of 44720728077 in words is "forty-four billion, seven hundred twenty million, seven hundred twenty-eight thousand, seventy-seven".