51534042040 has 96 divisors (see below), whose sum is σ = 126801871200. Its totient is φ = 18839308800.

The previous prime is 51534042031. The next prime is 51534042041. The reversal of 51534042040 is 4024043515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51534042041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 645021 + ... + 720499.

It is an arithmetic number, because the mean of its divisors is an integer number (1320852825).

Almost surely, 2^51534042040 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 51534042040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63400935600).

51534042040 is an abundant number, since it is smaller than the sum of its proper divisors (75267829160).

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

51534042040 is a wasteful number, since it uses less digits than its factorization.

51534042040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75617 (or 75600 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 51534042040 its reverse (4024043515), we get a palindrome (55558085555).

The spelling of 51534042040 in words is "fifty-one billion, five hundred thirty-four million, forty-two thousand, forty".