51490852560 has 1440 divisors, whose sum is σ = 230893079040. Its totient is φ = 10037035008.

The previous prime is 51490852559. The next prime is 51490852571. The reversal of 51490852560 is 6525809415.

51490852560 is a `hidden beast` number, since 5 + 1 + 4 + 9 + 0 + 85 + 2 + 560 = 666.

51490852560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 971525494 + ... + 971525546.

It is an arithmetic number, because the mean of its divisors is an integer number (160342416).

Almost surely, 2^51490852560 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 51490852560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115446539520).

51490852560 is an abundant number, since it is smaller than the sum of its proper divisors (179402226480).

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

51490852560 is a wasteful number, since it uses less digits than its factorization.

51490852560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 51490852560 in words is "fifty-one billion, four hundred ninety million, eight hundred fifty-two thousand, five hundred sixty".