56878658550 has 216 divisors, whose sum is σ = 177998971176. Its totient is φ = 12983604480.

The previous prime is 56878658549. The next prime is 56878658563. The reversal of 56878658550 is 5585687865.

56878658550 is a `hidden beast` number, since 5 + 6 + 8 + 78 + 6 + 5 + 8 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 24761002 + ... + 24763298.

It is an arithmetic number, because the mean of its divisors is an integer number (824069311).

Almost surely, 2^56878658550 is an apocalyptic number.

56878658550 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 56878658550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88999485588).

56878658550 is an abundant number, since it is smaller than the sum of its proper divisors (121120312626).

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

56878658550 is a wasteful number, since it uses less digits than its factorization.

56878658550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452 (or 3437 counting only the distinct ones).

The product of its (nonzero) digits is 80640000, while the sum is 63.

The spelling of 56878658550 in words is "fifty-six billion, eight hundred seventy-eight million, six hundred fifty-eight thousand, five hundred fifty".