51001040444 has 24 divisors (see below), whose sum is σ = 91340330928. Its totient is φ = 24903970560.

The previous prime is 51001040437. The next prime is 51001040521. The reversal of 51001040444 is 44404010015.

It is a happy number.

It is a super-2 number, since 2×51001040444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1538654 + ... + 1571450.

It is an arithmetic number, because the mean of its divisors is an integer number (3805847122).

Almost surely, 2^51001040444 is an apocalyptic number.

It is an amenable number.

51001040444 is a deficient number, since it is larger than the sum of its proper divisors (40339290484).

51001040444 is a wasteful number, since it uses less digits than its factorization.

51001040444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41885 (or 41883 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 51001040444 its reverse (44404010015), we get a palindrome (95405050459).

The spelling of 51001040444 in words is "fifty-one billion, one million, forty thousand, four hundred forty-four".