51440451104040 has 128 divisors (see below), whose sum is σ = 159646089456000. Its totient is φ = 13244163365888.

The previous prime is 51440451103991. The next prime is 51440451104071. The reversal of 51440451104040 is 4040115404415.

It is a happy number.

It is a super-2 number, since 2×51440451104040² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51440451103992 and 51440451104010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208527091 + ... + 208773629.

It is an arithmetic number, because the mean of its divisors is an integer number (1247235073875).

Almost surely, 2^{51440451104040} is an apocalyptic number.

It is an amenable number.

51440451104040 is an abundant number, since it is smaller than the sum of its proper divisors (108205638351960).

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

51440451104040 is a wasteful number, since it uses less digits than its factorization.

51440451104040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306539 (or 306535 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 33.

Adding to 51440451104040 its reverse (4040115404415), we get a palindrome (55480566508455).

The spelling of 51440451104040 in words is "fifty-one trillion, four hundred forty billion, four hundred fifty-one million, one hundred four thousand, forty".