51042442404 has 96 divisors (see below), whose sum is σ = 127513927296. Its totient is φ = 15834941440.

The previous prime is 51042442397. The next prime is 51042442439. The reversal of 51042442404 is 40424424015.

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, 14251894 + ... + 14255474.

It is an arithmetic number, because the mean of its divisors is an integer number (1328270076).

Almost surely, 2^51042442404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51042442404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63756963648).

51042442404 is an abundant number, since it is smaller than the sum of its proper divisors (76471484892).

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

51042442404 is a wasteful number, since it uses less digits than its factorization.

51042442404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365 (or 4363 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 30.

Adding to 51042442404 its reverse (40424424015), we get a palindrome (91466866419).

The spelling of 51042442404 in words is "fifty-one billion, forty-two million, four hundred forty-two thousand, four hundred four".