51046025440 has 192 divisors, whose sum is σ = 124350145920. Its totient is φ = 19797073920.

The previous prime is 51046025357. The next prime is 51046025449. The reversal of 51046025440 is 4452064015.

It is a happy number.

It is a super-2 number, since 2×51046025440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51046025449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282022150 + ... + 282022330.

It is an arithmetic number, because the mean of its divisors is an integer number (647657010).

Almost surely, 2^51046025440 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 51046025440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62175072960).

51046025440 is an abundant number, since it is smaller than the sum of its proper divisors (73304120480).

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

51046025440 is a wasteful number, since it uses less digits than its factorization.

51046025440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 51046025440 its reverse (4452064015), we get a palindrome (55498089455).

The spelling of 51046025440 in words is "fifty-one billion, forty-six million, twenty-five thousand, four hundred forty".