55757645 has 4 divisors (see below), whose sum is σ = 66909180. Its totient is φ = 44606112.

The previous prime is 55757641. The next prime is 55757659. The reversal of 55757645 is 54675755.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35200489 + 20557156 = 5933^2 + 4534^2 .

It is a cyclic number.

It is not a de Polignac number, because 55757645 - 2² = 55757641 is a prime.

It is a super-3 number, since 3×55757645³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55757596 and 55757605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55757641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5575760 + ... + 5575769.

It is an arithmetic number, because the mean of its divisors is an integer number (16727295).

Almost surely, 2^55757645 is an apocalyptic number.

It is an amenable number.

55757645 is a deficient number, since it is larger than the sum of its proper divisors (11151535).

55757645 is a wasteful number, since it uses less digits than its factorization.

55757645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11151534.

The product of its digits is 735000, while the sum is 44.

The square root of 55757645 is about 7467.1041910502. The cubic root of 55757645 is about 382.0335236426.

The spelling of 55757645 in words is "fifty-five million, seven hundred fifty-seven thousand, six hundred forty-five".