51240384468 has 360 divisors, whose sum is σ = 168089399296. Its totient is φ = 13069123200.

The previous prime is 51240384443. The next prime is 51240384511. The reversal of 51240384468 is 86448304215.

51240384468 is a `hidden beast` number, since 512 + 4 + 0 + 38 + 44 + 68 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 34832973 + ... + 34834443.

Almost surely, 2^51240384468 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 51240384468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84044699648).

51240384468 is an abundant number, since it is smaller than the sum of its proper divisors (116849014828).

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

51240384468 is a wasteful number, since it uses less digits than its factorization.

51240384468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 51240384468 in words is "fifty-one billion, two hundred forty million, three hundred eighty-four thousand, four hundred sixty-eight".