51145044444 has 72 divisors (see below), whose sum is σ = 139299058080. Its totient is φ = 15728925312.

The previous prime is 51145044407. The next prime is 51145044449. The reversal of 51145044444 is 44444054115.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51145044399 and 51145044408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145044449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 927454 + ... + 981050.

It is an arithmetic number, because the mean of its divisors is an integer number (1934709140).

Almost surely, 2^51145044444 is an apocalyptic number.

It is an amenable number.

51145044444 is an abundant number, since it is smaller than the sum of its proper divisors (88154013636).

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

51145044444 is a wasteful number, since it uses less digits than its factorization.

51145044444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55659 (or 55654 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 36.

Adding to 51145044444 its reverse (44444054115), we get a palindrome (95589098559).

The spelling of 51145044444 in words is "fifty-one billion, one hundred forty-five million, forty-four thousand, four hundred forty-four".