51017391044 has 6 divisors (see below), whose sum is σ = 89280434334. Its totient is φ = 25508695520.

The previous prime is 51017390971. The next prime is 51017391077. The reversal of 51017391044 is 44019371015.

It can be written as a sum of positive squares in only one way, i.e., 28388206144 + 22629184900 = 168488^2 + 150430^2 .

It is a super-2 number, since 2×51017391044² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51017390995 and 51017391013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6377173877 + ... + 6377173884.

It is an arithmetic number, because the mean of its divisors is an integer number (14880072389).

Almost surely, 2^51017391044 is an apocalyptic number.

It is an amenable number.

51017391044 is a deficient number, since it is larger than the sum of its proper divisors (38263043290).

51017391044 is a wasteful number, since it uses less digits than its factorization.

51017391044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12754347765 (or 12754347763 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 51017391044 in words is "fifty-one billion, seventeen million, three hundred ninety-one thousand, forty-four".