55787645 has 8 divisors (see below), whose sum is σ = 67050720. Its totient is φ = 44559760.

The previous prime is 55787623. The next prime is 55787647. The reversal of 55787645 is 54678755.

55787645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55787645 - 2¹² = 55783549 is a prime.

It is a super-2 number, since 2×55787645² = 6224522669292050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55787645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55787647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5171 + ... + 11760.

It is an arithmetic number, because the mean of its divisors is an integer number (8381340).

Almost surely, 2^55787645 is an apocalyptic number.

It is an amenable number.

55787645 is a deficient number, since it is larger than the sum of its proper divisors (11263075).

55787645 is a wasteful number, since it uses less digits than its factorization.

55787645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17595.

The product of its digits is 1176000, while the sum is 47.

The square root of 55787645 is about 7469.1127317774. The cubic root of 55787645 is about 382.1020281548.

Subtracting from 55787645 its product of digits (1176000), we obtain a palindrome (54611645).

The spelling of 55787645 in words is "fifty-five million, seven hundred eighty-seven thousand, six hundred forty-five".