51440024140 has 48 divisors (see below), whose sum is σ = 109478809440. Its totient is φ = 20300733440.

The previous prime is 51440024117. The next prime is 51440024149. The reversal of 51440024140 is 4142004415.

51440024140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51440024149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396516 + ... + 510004.

It is an arithmetic number, because the mean of its divisors is an integer number (2280808530).

Almost surely, 2^51440024140 is an apocalyptic number.

It is an amenable number.

51440024140 is an abundant number, since it is smaller than the sum of its proper divisors (58038785300).

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

51440024140 is a wasteful number, since it uses less digits than its factorization.

51440024140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113802 (or 113800 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 51440024140 its reverse (4142004415), we get a palindrome (55582028555).

The spelling of 51440024140 in words is "fifty-one billion, four hundred forty million, twenty-four thousand, one hundred forty".