55565474250 has 256 divisors, whose sum is σ = 163487600640. Its totient is φ = 12392352000.

The previous prime is 55565474231. The next prime is 55565474257. The reversal of 55565474250 is 5247456555.

It is a self number, because there is not a number n which added to its sum of digits gives 55565474250.

It is not an unprimeable number, because it can be changed into a prime (55565474257) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 40647067 + ... + 40648433.

It is an arithmetic number, because the mean of its divisors is an integer number (638623440).

Almost surely, 2^55565474250 is an apocalyptic number.

55565474250 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 55565474250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81743800320).

55565474250 is an abundant number, since it is smaller than the sum of its proper divisors (107922126390).

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

55565474250 is a wasteful number, since it uses less digits than its factorization.

55565474250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 4200000, while the sum is 48.

The spelling of 55565474250 in words is "fifty-five billion, five hundred sixty-five million, four hundred seventy-four thousand, two hundred fifty".