51044855040 has 216 divisors, whose sum is σ = 178264745568. Its totient is φ = 13484421120.

The previous prime is 51044855039. The next prime is 51044855077. The reversal of 51044855040 is 4055844015.

It is a happy number.

51044855040 is a `hidden beast` number, since 5 + 104 + 48 + 5 + 504 + 0 = 666.

It is a super-2 number, since 2×51044855040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51044854986 and 51044855004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1211935 + ... + 1253345.

It is an arithmetic number, because the mean of its divisors is an integer number (825299748).

Almost surely, 2^51044855040 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 51044855040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89132372784).

51044855040 is an abundant number, since it is smaller than the sum of its proper divisors (127219890528).

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

51044855040 is a wasteful number, since it uses less digits than its factorization.

51044855040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41545 (or 41528 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

The spelling of 51044855040 in words is "fifty-one billion, forty-four million, eight hundred fifty-five thousand, forty".