44551220004 has 18 divisors (see below), whose sum is σ = 112615583990. Its totient is φ = 14850406656.

The previous prime is 44551220003. The next prime is 44551220033. The reversal of 44551220004 is 40002215544.

44551220004 is a `hidden beast` number, since 4 + 455 + 1 + 2 + 200 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39640013604 + 4911206400 = 199098^2 + 70080^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×44551220004² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44551220004.

It is not an unprimeable number, because it can be changed into a prime (44551220003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 618766909 + ... + 618766980.

Almost surely, 2^44551220004 is an apocalyptic number.

It is an amenable number.

44551220004 is an abundant number, since it is smaller than the sum of its proper divisors (68064363986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

44551220004 is a wasteful number, since it uses less digits than its factorization.

44551220004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237533899 (or 1237533894 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 44551220004 its reverse (40002215544), we get a palindrome (84553435548).

The spelling of 44551220004 in words is "forty-four billion, five hundred fifty-one million, two hundred twenty thousand, four".