55564640250 has 768 divisors, whose sum is σ = 186842972160. Its totient is φ = 10886400000.

The previous prime is 55564640239. The next prime is 55564640293. The reversal of 55564640250 is 5204646555.

It is a happy number.

It is a super-2 number, since 2×55564640250² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 367977675 + ... + 367977825.

It is an arithmetic number, because the mean of its divisors is an integer number (243285120).

Almost surely, 2^55564640250 is an apocalyptic number.

55564640250 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 55564640250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93421486080).

55564640250 is an abundant number, since it is smaller than the sum of its proper divisors (131278331910).

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

55564640250 is a wasteful number, since it uses less digits than its factorization.

55564640250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 55564640250 in words is "fifty-five billion, five hundred sixty-four million, six hundred forty thousand, two hundred fifty".