55664500 has 48 divisors (see below), whose sum is σ = 122496192. Its totient is φ = 22096800.

The previous prime is 55664473. The next prime is 55664527. The reversal of 55664500 is 546655.

It is an interprime number because it is at equal distance from previous prime (55664473) and next prime (55664527).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81159 + ... + 81841.

It is an arithmetic number, because the mean of its divisors is an integer number (2552004).

Almost surely, 2^55664500 is an apocalyptic number.

55664500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55664500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61248096).

55664500 is an abundant number, since it is smaller than the sum of its proper divisors (66831692).

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

55664500 is a wasteful number, since it uses less digits than its factorization.

55664500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 55664500 is about 7460.8645611618. The cubic root of 55664500 is about 381.8206718384.

It can be divided in two parts, 556 and 64500, that added together give a palindrome (65056).

The spelling of 55664500 in words is "fifty-five million, six hundred sixty-four thousand, five hundred".