51260370040 has 64 divisors (see below), whose sum is σ = 126138267360. Its totient is φ = 18593118720.

The previous prime is 51260370023. The next prime is 51260370061. The reversal of 51260370040 is 4007306215.

It is a super-3 number, since 3×51260370040³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51260369990 and 51260370008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27954 + ... + 321406.

Almost surely, 2^51260370040 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 51260370040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63069133680).

51260370040 is an abundant number, since it is smaller than the sum of its proper divisors (74877897320).

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

51260370040 is a wasteful number, since it uses less digits than its factorization.

51260370040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293872 (or 293868 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 51260370040 its reverse (4007306215), we get a palindrome (55267676255).

The spelling of 51260370040 in words is "fifty-one billion, two hundred sixty million, three hundred seventy thousand, forty".