55646307 has 24 divisors (see below), whose sum is σ = 86682960. Its totient is φ = 34283520.

The previous prime is 55646251. The next prime is 55646309. The reversal of 55646307 is 70364655.

55646307 is a `hidden beast` number, since 5 + 5 + 646 + 3 + 0 + 7 = 666.

It is not a de Polignac number, because 55646307 - 2¹⁵ = 55613539 is a prime.

It is a super-2 number, since 2×55646307² = 6193022965476498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55646309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3043 + ... + 10979.

It is an arithmetic number, because the mean of its divisors is an integer number (3611790).

Almost surely, 2^55646307 is an apocalyptic number.

55646307 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

55646307 is a deficient number, since it is larger than the sum of its proper divisors (31036653).

55646307 is a wasteful number, since it uses less digits than its factorization.

55646307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8003 (or 8000 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 55646307 is about 7459.6452328512. The cubic root of 55646307 is about 381.7790700970.

The spelling of 55646307 in words is "fifty-five million, six hundred forty-six thousand, three hundred seven".