56451659550 has 384 divisors, whose sum is σ = 171559019520. Its totient is φ = 12096000000.

The previous prime is 56451659483. The next prime is 56451659581. The reversal of 56451659550 is 5595615465.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56451659493 and 56451659502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 93929250 + ... + 93929850.

It is an arithmetic number, because the mean of its divisors is an integer number (446768280).

Almost surely, 2^56451659550 is an apocalyptic number.

56451659550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 56451659550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85779509760).

56451659550 is an abundant number, since it is smaller than the sum of its proper divisors (115107359970).

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

56451659550 is a wasteful number, since it uses less digits than its factorization.

56451659550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 56451659550 in words is "fifty-six billion, four hundred fifty-one million, six hundred fifty-nine thousand, five hundred fifty".