51810554880 has 704 divisors, whose sum is σ = 213349148160. Its totient is φ = 11824496640.

The previous prime is 51810554839. The next prime is 51810554923. The reversal of 51810554880 is 8845501815.

51810554880 is a `hidden beast` number, since 5 + 1 + 8 + 10 + 554 + 8 + 80 = 666.

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 63 ways as a sum of consecutive naturals, for example, 78381750 + ... + 78382410.

Almost surely, 2^51810554880 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 51810554880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106674574080).

51810554880 is an abundant number, since it is smaller than the sum of its proper divisors (161538593280).

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

51810554880 is an frugal number, since it uses more digits than its factorization.

51810554880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 45.

It can be divided in two parts, 518105 and 54880, that added together give a triangular number (572985 = T₁₀₇₀).

The spelling of 51810554880 in words is "fifty-one billion, eight hundred ten million, five hundred fifty-four thousand, eight hundred eighty".