51440214144 has 64 divisors (see below), whose sum is σ = 149059723680. Its totient is φ = 15587942400.

The previous prime is 51440214131. The next prime is 51440214149. The reversal of 51440214144 is 44141204415.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (51440214149) 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, 6084817 + ... + 6093264.

Almost surely, 2^51440214144 is an apocalyptic number.

It is an amenable number.

51440214144 is an abundant number, since it is smaller than the sum of its proper divisors (97619509536).

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

51440214144 is a wasteful number, since it uses less digits than its factorization.

51440214144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12178109 (or 12178097 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

Adding to 51440214144 its reverse (44141204415), we get a palindrome (95581418559).

The spelling of 51440214144 in words is "fifty-one billion, four hundred forty million, two hundred fourteen thousand, one hundred forty-four".