51840450480 has 320 divisors, whose sum is σ = 198185315328. Its totient is φ = 10915983360.

The previous prime is 51840450479. The next prime is 51840450491. The reversal of 51840450480 is 8405404815.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 12468562 + ... + 12472718.

Almost surely, 2^51840450480 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 51840450480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99092657664).

51840450480 is an abundant number, since it is smaller than the sum of its proper divisors (146344864848).

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

51840450480 is a wasteful number, since it uses less digits than its factorization.

51840450480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 39.

The spelling of 51840450480 in words is "fifty-one billion, eight hundred forty million, four hundred fifty thousand, four hundred eighty".