55638650 has 24 divisors (see below), whose sum is σ = 108936480. Its totient is φ = 21083760.

The previous prime is 55638641. The next prime is 55638659. The reversal of 55638650 is 5683655.

It is an interprime number because it is at equal distance from previous prime (55638641) and next prime (55638659).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (55638659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28334 + ... + 30233.

It is an arithmetic number, because the mean of its divisors is an integer number (4539020).

Almost surely, 2^55638650 is an apocalyptic number.

55638650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55638650 is a deficient number, since it is larger than the sum of its proper divisors (53297830).

55638650 is a wasteful number, since it uses less digits than its factorization.

55638650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58598 (or 58593 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 55638650 is about 7459.1319870344. The cubic root of 55638650 is about 381.7615582045.

The spelling of 55638650 in words is "fifty-five million, six hundred thirty-eight thousand, six hundred fifty".