51444440044 has 24 divisors (see below), whose sum is σ = 96306250320. Its totient is φ = 23959566336.

The previous prime is 51444440041. The next prime is 51444440053. The reversal of 51444440044 is 44004444415.

It is a super-2 number, since 2×51444440044² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 51444439991 and 51444440009.

It is not an unprimeable number, because it can be changed into a prime (51444440041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3893074 + ... + 3906265.

It is an arithmetic number, because the mean of its divisors is an integer number (4012760430).

Almost surely, 2^51444440044 is an apocalyptic number.

It is an amenable number.

51444440044 is a deficient number, since it is larger than the sum of its proper divisors (44861810276).

51444440044 is a wasteful number, since it uses less digits than its factorization.

51444440044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7799457 (or 7799455 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 34.

Adding to 51444440044 its reverse (44004444415), we get a palindrome (95448884459).

The spelling of 51444440044 in words is "fifty-one billion, four hundred forty-four million, four hundred forty thousand, forty-four".