51538492080 has 360 divisors, whose sum is σ = 181212174000. Its totient is φ = 13630643712.

The previous prime is 51538492043. The next prime is 51538492151. The reversal of 51538492080 is 8029483515.

51538492080 is a `hidden beast` number, since 5 + 153 + 8 + 492 + 0 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 78206791 + ... + 78207449.

It is an arithmetic number, because the mean of its divisors is an integer number (503367150).

Almost surely, 2^51538492080 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 51538492080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90606087000).

51538492080 is an abundant number, since it is smaller than the sum of its proper divisors (129673681920).

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

51538492080 is an equidigital number, since it uses as much as digits as its factorization.

51538492080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 51538492080 in words is "fifty-one billion, five hundred thirty-eight million, four hundred ninety-two thousand, eighty".