51804027440 has 240 divisors, whose sum is σ = 141095969280. Its totient is φ = 17493765120.

The previous prime is 51804027439. The next prime is 51804027521. The reversal of 51804027440 is 4472040815.

It is a self number, because there is not a number n which added to its sum of digits gives 51804027440.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46965929 + ... + 46967031.

It is an arithmetic number, because the mean of its divisors is an integer number (587899872).

Almost surely, 2^51804027440 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 51804027440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70547984640).

51804027440 is an abundant number, since it is smaller than the sum of its proper divisors (89291941840).

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

51804027440 is a wasteful number, since it uses less digits than its factorization.

51804027440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1193 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The spelling of 51804027440 in words is "fifty-one billion, eight hundred four million, twenty-seven thousand, four hundred forty".