51440410042 has 16 divisors (see below), whose sum is σ = 88223034240. Its totient is φ = 22036021488.

The previous prime is 51440410033. The next prime is 51440410081. The reversal of 51440410042 is 24001404415.

It is a super-2 number, since 2×51440410042² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51440409989 and 51440410016.

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, 789942 + ... + 852577.

It is an arithmetic number, because the mean of its divisors is an integer number (5513939640).

Almost surely, 2^51440410042 is an apocalyptic number.

51440410042 is a deficient number, since it is larger than the sum of its proper divisors (36782624198).

51440410042 is a wasteful number, since it uses less digits than its factorization.

51440410042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644765.

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

Adding to 51440410042 its reverse (24001404415), we get a palindrome (75441814457).

The spelling of 51440410042 in words is "fifty-one billion, four hundred forty million, four hundred ten thousand, forty-two".