51004054644 has 24 divisors (see below), whose sum is σ = 121541578368. Its totient is φ = 16639620480.

The previous prime is 51004054579. The next prime is 51004054679. The reversal of 51004054644 is 44645040015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45215797 + ... + 45216924.

It is an arithmetic number, because the mean of its divisors is an integer number (5064232432).

Almost surely, 2^51004054644 is an apocalyptic number.

It is an amenable number.

51004054644 is an abundant number, since it is smaller than the sum of its proper divisors (70537523724).

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

51004054644 is a wasteful number, since it uses less digits than its factorization.

51004054644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90432775 (or 90432773 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 51004054644 its reverse (44645040015), we get a palindrome (95649094659).

The spelling of 51004054644 in words is "fifty-one billion, four million, fifty-four thousand, six hundred forty-four".